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post #181 of 191 (permalink) Old Mar 28th, 2019, 03:40 PM
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Re: Project: WTA weekly rankings since 1983

I can confirm that the 19 December 1983 rankings are correct and match actually the official 1983 year end rankings.


Here they are if you want to check them against your own list Angliru


1983 WTA Year End Computer Ranking

001 Martina Navratilova (United States) at: https://www.tennisforum.com/51525849-post3212.html
002 Chris Evert-Lloyd (United States)at: https://www.tennisforum.com/25392690-post626.html
003 Andrea Jaeger (United States) at: https://www.tennisforum.com/76760538-post4441.html
004 Pam Shriver (United States) at: https://www.tennisforum.com/25513962-post1785.html
005 Sylvia Hanika (Germany) at: https://www.tennisforum.com/39072425-post2853.html
006 Jo Durie (Great Britain) at: https://www.tennisforum.com/34808977-post2795.html
007 Bettina Bunge (Germany) at: https://www.tennisforum.com/81042213-post4868.html
008 Wendy Turnbull (Australia) at: https://www.tennisforum.com/25565514-post2002.html
009 Tracy Austin (United States) at: https://www.tennisforum.com/24966346-post79.html
010 Zina Garrison (United States) at: https://www.tennisforum.com/25410714-post711.html

011 Andrea Temesvari (Hungary) at: https://www.tennisforum.com/25515410-post1940.html
012 Hana Mandlikova (Czechoslovakia) at: https://www.tennisforum.com/25491706-post1210.html
013 Billie Jean King (United States) at: https://www.tennisforum.com/25450954-post1053.html
014 Kathy Jordan (United States) at: https://www.tennisforum.com/25569482-post2301.html
015 Kathleen Horvath (United States) at: https://www.tennisforum.com/25448722-post948.html
016 Kathy Rinaldi (United States) at: https://www.tennisforum.com/25512450-post1629.html
017 Helena Sukova (Czechoslovakia) at: https://www.tennisforum.com/25515026-post1900.html
018 Virginia Ruzici (Romania) at: https://www.tennisforum.com/34808953-post2795.html
019 Bonnie Gadusek (United States) at: https://www.tennisforum.com/34808985-post2798.html
020 Carling Bassett (Canada) at: https://www.tennisforum.com/25135874-post144.html

021 Ivanna Madruga-Osses (Argentina) at:https://www.tennisforum.com/25478050-post1200.html
022 Eva Pfaff (Germany) at: https://www.tennisforum.com/61986569-post3607.html
023 Mima Jausovec (Yugoslavia) at: https://www.tennisforum.com/61986737-post3615.html
024 Claudia Kohde (Germany) at: https://www.tennisforum.com/25451234-post1070.html
025 Barbara Potter (United States) at: https://www.tennisforum.com/25685338-post2306.html
026 Rosalyn Fairbank (South Africa) https://www.tennisforum.com/25392738-post631.html
027 Iva Budarova (Czechoslovakia) at: https://www.tennisforum.com/81042215-post4869.html
028 Anne Smith (United States) at:https://www.tennisforum.com/25514506-post1846.html
029 Christiane Jolissaint (Switzerland)
030 Michelle Torres (United States)

031 Manuela Maleeva (Bulgaria) at: https://www.tennisforum.com/25478106-post1205.html
032 Alycia Moulton (United States)
033 Catherine Tanvier (France) at: https://www.tennisforum.com/25515338-post1933.html
034 Wendy White (United States) at: https://www.tennisforum.com/25567962-post2161.html
035 Anne White (United States) at: https://www.tennisforum.com/50462521-post3173.html
036 Lisa Bonder (United States)(
037 Evonne Goolagong Cawley (Australia) at: https://www.tennisforum.com/25414842-post742.html
038 Pam Casale (United States)
039 Kim Shaefer (United States)
040 Virginia Wade (Great Britain) at: https://www.tennisforum.com/25566634-post2080.html

041 Yvonne Vermaak (South Africa) at: https://www.tennisforum.com/80615543-post4760.html
042 Elise Burgin (United States) at: https://www.tennisforum.com/81042237-post4877.html
043 Joanne Russell (United States)
044 Beth Herr (United States) at: https://www.tennisforum.com/25443066-post889.html
045 Sharon Walsh (United States)
046 Andrea Leand (United States)
047 Ann Hobbs (Great Britain)
048 Raffaella Reggi (Italy) at: https://www.tennisforum.com/78702385-post4468.html
049 Camille Benjamin (United States)
050 Marcella Mesker (Netherlands)

051 Petra Delhees (Switzerland)
052 Peanut Louie (United States) at: https://www.tennisforum.com/25477770-post1177.html
053 Laura Arraya (Peru) at: https://www.tennisforum.com/24966090-post53.html
054 Terry Phelps (United States)
055 Gretchen Rush (United States) at: https://www.tennisforum.com/25512906-post1677.html
056 Rosie Casals at: https://www.tennisforum.com/29155417-post2595.html
057 Sue Barker (Great Britain) at: https://www.tennisforum.com/25135770-post134.html
058 Ginny Purdy (United States)
059 Sandy Collins (United States)
060 Kim Sands (United States)

061 Betsy Nagelson (United States)
062 Caterina Jexell (Sweden)
063 Leigh Thompson (United States)
064 Mary Lou Piatek (United States)
065 Patricia Hy (Honk Kong)
066 Leslie Allen (United States)
067 Corinne Vanier (France)
068 Jennifer Mundel (South Africa)
069 Kate Gompert (United States)
070 Elizabeth Sayers (Australlia) at: https://www.tennisforum.com/25514274-post1818.html

071 Julie Harrington (United States)
072 Beverly Mould (South Africa) at: https://www.tennisforum.com/74263834-post4270.html
073 Ann Kiyomura (United States)
074 Paula Smith (United States)
075 Dianne Balestrat (Australia) at: https://www.tennisforum.com/25410514-post688.html
076 Heather Ludloff (United States)
077 Candy Reynolds (United States)
078 Sherry Acker (United States)
079 Terry Holladay (United States) at: https://www.tennisforum.com/25448314-post922.html
080 Catherine Suire (France)

081 Etsuko Inoue (Japan)
082 Anna-Maria Fernandez (United States) at: https://www.tennisforum.com/80905005-post4847.html
083 Shelly Solomon (United States)
084 Gigi Fernandez (United States) at: https://www.tennisforum.com/75491121-post4344.html
085 Kate Latham ((United States)
086 Lena Sandin (Sweden)
087 Pascale Paradis (France) at: https://www.tennisforum.com/25510826-post1460.html
088 Pilar Vasquez (Peru)
089 Petra Huber (Austria)

090 Duk-Hee Lee (Korea) at: https://www.tennisforum.com/52963562-post3316.html
091 Claudia Monteiro (Brazil)
092 Lele Forood (United States) at: https://www.tennisforum.com/69770625-post3962.html
093 Susan Mascarin (United States) at: https://www.tennisforum.com/25492050-post1238.html
094 Marie-Christine Calleja (France)
095 Anne Minter (Australia) at: https://www.tennisforum.com/25492906-post1320.html
096 Sabina Simmonds (Italy) at: https://www.tennisforum.com/27090458-post2470.html
097 Katerina Skronska (Czech Republic) at: https://www.tennisforum.com/25514098-post1800.html
098 Steffi Graf (Germany) at: https://www.tennisforum.com/25415178-post765.html
099 Michaela Pazderova (Czechoslovakia)at: https://www.tennisforum.com/60230761-post3499.html
100 Amy Holton (United States)
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Last edited by Rollo; Mar 28th, 2019 at 04:38 PM.
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post #182 of 191 (permalink) Old Mar 29th, 2019, 09:01 AM Thread Starter
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Re: Project: WTA weekly rankings since 1983

Thanks, Rollo. I've assumed December 5th was the correct date of the year end rankings because WTA said so but your reasoning is credible. I'll edit and update the rest of 1983 in a few days.

For anyone interested, there's a bit more on this issue in Rollo's thread here.

EDIT: I can confirm that our top 100 lists of December 19 are identical.

Last edited by angliru; Mar 29th, 2019 at 09:18 AM.
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post #183 of 191 (permalink) Old Apr 14th, 2019, 07:59 AM Thread Starter
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Re: Project: WTA weekly rankings since 1983

Big update. 1983 now has 11 full top 100 lists confirmed from various sources (plus a couple almost full). Almost all weeks have minor updates. 14 lists now have points for top 20, one week for top 10. The last 6 lists of the year all have points which could be useful if one wants to calculate or analyse a (top 10) player's points.

A table of the changes as per 2019-02-24 & 2019-04-14 updates:

Code:
                       BEFORE                               NOW
Ranking date  # of listed players   Points        # of listed players   Points
                    in top 100                          in top 100

1983-01-17               78           No                     79           No
1983-01-31               78           No                    100         Top 20
1983-02-14               79           No                     80           No
1983-02-28               78           No                    100         Top 20
1983-03-14               78           No                    100         Top 20
1983-03-28               77           No                    100           No
1983-04-11               78           No                     81         Top 20
1983-04-25               77           No                     78           No
1983-05-09               79           No                     97         Top 20
1983-05-23               79           No                     80           No
1983-06-06               82           No                    100         Top 20
1983-06-20               80           No                     81           No
1983-07-04               80           No                     81           No
1983-07-18               78           No                     78           No
1983-08-01               78           No                    100         Top 20
1983-08-15               79           No                     79           No
1983-08-29               80(+5)       No                    100         Top 20
1983-09-12               81(+5)       No                    100         Top 20
1983-09-26               81           No                     81           No
1983-10-10               80           No                     95         Top 20
1983-10-24               78           No                    100         Top 20
1983-11-07               80           No                     80         Top 10
1983-11-21               82           No                     84         Top 20
1983-12-05              100       pdf @ WTA                 100         Top 20
1983-12-19              100       pdf attch'd               100         Top 20+pdf
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post #184 of 191 (permalink) Old Apr 16th, 2019, 03:10 AM
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Re: Project: WTA weekly rankings since 1983

Fantastic work Angliru!

I have found a potential new source for you. Virginia Slims kept many internal documents related to tennis.

The WTA ranking as on 29 August 1983: https://www.industrydocuments.ucsf.e...s/#id=nzbx0130
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post #185 of 191 (permalink) Old Apr 16th, 2019, 12:23 PM Thread Starter
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Re: Project: WTA weekly rankings since 1983

Thanks, Rollo. It's really interesting. I've been sent a few of those files and I'll link to the once I have as I progress.
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post #186 of 191 (permalink) Old Apr 17th, 2019, 09:05 AM Thread Starter
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Re: Project: WTA weekly rankings since 1983

I've updated the first four lists of 1984 - all with points (top 12 or 20). Now we have 10 consecutive lists with points from October 10, 1983 to February 20, 1984. February 20 was the last list with the very complicated 'vintage' computer rankings system.

2019-04-17 updates:

Code:
                       BEFORE                               NOW
Ranking date  # of listed players   Points        # of listed players   Points
                    in top 100                          in top 100

1984-01-09               73           No                    99+1        Top 20
1984-01-23               72           No                    72+4        Top 12
1984-02-06               75           No                    100         Top 20
1984-02-20               76           No                     77         Top 20

Last edited by angliru; Apr 19th, 2019 at 07:42 AM.
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post #187 of 191 (permalink) Old Apr 19th, 2019, 07:51 AM Thread Starter
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Re: Project: WTA weekly rankings since 1983

I've added the 1984 point tables to the post of 05 March 1984. Thanks to @elegos7 for posting these here.

Round points

Code:
Category                W     RU    SF    QF  R16  R32  R64  R128
Grand Slam             300   225   150    75   38   19   10    1
$151K+                 200   150   100    50   25   13    7    1
$150K                  150   113    75    38   19   10    1
$100K-199K             100    75    50    25   13    1
$50K-99K                50    38    25    13    7    1
$25K+                   10   7.5     5   2.5  1.25 0.75
$10K+                    1  0.75   0.5  0.25  0.125
Bonus Points

Code:
Loser's Rank         Bonus Points
     1          =         44
     2          =         40
    3-5         =         30
    6-8         =         20
    9-11        =         15
   12-18        =         10
   19-30        =          5
   31-50        =          3
   51-75        =          2
   76-100       =          1
  101-150       =         0.5
  151-200       =         0.25
- Average ranking system (in use in some form until and including 1996).
- Total points are made up of round points + bonus points.
- Points are discounted after 26 weeks (divided by 2), and drop off completely after 52 weeks.
- Average is total points (some discounted) divided by # of tournaments (12 is minimum divisor).

The full official list is available here.

The new points system - in use from 05 March 1984 - was quite a simplification compared to what had been in use until then. For instance, the old rankings had a column named "number of matches" that was part of the formula for calculating points. This is gone now.

The first released ranking using the new system was done by recalculating the player's points using the new system a year back. This caused some significant changes in the rankings from 20 February to 05 March because there was little correspondence between the former and the new system.

Kathy Jordan, for instance, moved from #12 to #7 although the only change in her results was that a 50K semifinal (and three won matches) dropped off and was replaced by a 1st round loss! Likewise, Lisa Bonder moved from #28 to #16 by winning one 1st round match against Sherry Acker at a 150K in the week of 20 February 1984. Evonne Goolagong Cawley, on the other hand, dropped from #36 to #96 while her match history didn't change at all (because of the diminishing of points older than 26 weeks). The top 4 didn't change though, and I can imagine WTA putting some effort into analysing the outcome of the new system in order to not cause any 'injustice' towards the top players?
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post #188 of 191 (permalink) Old Apr 19th, 2019, 08:42 AM Thread Starter
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Re: Project: WTA weekly rankings since 1983

Some handy features of the new ranking lists since 05 March 1984 are the two columns "Next to be discounted" and "Next to drop off". These columns make it's relatively easy to see or calculate how many points the players have earned at each tournament (or for each 2-week period if they have played in both weeks). This info is not available at wta.com for 1984. The only problem is that we don't have too many of these official lists.

Here is an excerpt of the 05 March 1984 list:



Example 1: Let's have a look at Martina Navratilova's "Next to drop off" points (115). These are the points that are older than 52 weeks at the next update (19 March). Navratilova only played one tournament in that timeframe of 1983, the $150,000 Virginia Slims of Dallas, March 7-13. We know therefore that she earned 230 points at that tournament. It's 2 times 115 because the points were divided by 2 after 26 weeks.

Test: Navratilova won the title. This is worth 150 points (see tables in my previous post).

She defeated (rankings): Sue Barker (53), Ann Kiyomura (33), Hana Mandlikova (8), Bettina Bunge (9), Chris Evert (2). This is worth 2 + 3 + 20 + 15 + 40 = 80 bonus points.

Total points: 150 + 80 = 230 points


Example 2: Pascale Paradis' "Next to be discounted" points are 55.5. These are the points that will become 26 weeks old and must be divided by 2 at the next update. In Paradis' case it is her points from US Open 1983.

Test: Paradis reached R16, which is worth 38 round points.

She defeated (rankings): Dianne Fromholtz (67), Sabrina Goles (115), Andrea Temesvari (10). This is worth 2 + 0.5 + 15 = 17.5 bonus points.

Total points: 38 + 17.5 = 55.5 points

I have to stress though, that there are cases where the points don't seem to add up correctly.
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post #189 of 191 (permalink) Old Apr 19th, 2019, 07:21 PM
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Re: Project: WTA weekly rankings since 1983

Quote:
Originally Posted by angliru View Post
I have to stress though, that there are cases where the points don't seem to add up correctly.
I encountered the same problem. I suspect the bonus point system may have been different in 1983 than in 1984.

E.g. I counted the points Navratilova won at the 1983 US Open and counted 93.5 bonus points instead of the official 89.
On another occasion (Evert at the 1983 German Open) I count only 163 total points instead of the official 175.

Keep us updated if you figure out why the points do not always add up correctly.
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post #190 of 191 (permalink) Old Apr 26th, 2019, 02:13 PM Thread Starter
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Re: Project: WTA weekly rankings since 1983

Quote:
Originally Posted by elegos7 View Post
Keep us updated if you figure out why the points do not always add up correctly.
I will, but I've had no luck so far. I've not put a lot of effort into it but I've tried a few things. I don't see any consitent pattern. We're not far off wit the current points scale but it would be nice if we could calculate the points with 100% accuracy.
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post #191 of 191 (permalink) Old Apr 26th, 2019, 02:20 PM Thread Starter
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Re: Project: WTA weekly rankings since 1983

I've done a bit of thread maintenance and updated 1984 through July. Now 13 of 15 lists of 1984 have points. All list except two have more players listed than what's available at WTA. I've also added a few attachments when lists are from newspapers (usually the top 10 lists).

Code:
                       BEFORE                               NOW
Ranking date  # of listed players   Points        # of listed players   Points
                    in top 100                          in top 100

1984-01-09               73           No                    99+1        Top 20
1984-01-23               72           No                    72+4        Top 12
1984-02-06               75           No                    100         Top 20
1984-02-20               76           No                     76+1       Top 20
1984-03-05               77           No                    100         Top 20
1984-03-19               77           No                    100         Top 20
1984-04-02               75           No                     75+1       Top 20
1984-04-16               75           No                     76           No
1984-04-30               76           No                     76           No
1984-05-14               76           No                     85         Top 20
1984-05-28               75           No                     75         Top 10
1984-06-11               76           No                    100         Top 20
1984-06-25               76           No                     76         Top 10
1984-07-09               76           No                     83         Top 20
1984-07-23               77           No                     91         Top 20
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