Unforced errors and total points thread - TennisForum.com
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 Dec 29th, 2013, 05:21 PM #1 Bino Senior Member     Join Date: Jan 2013 Posts: 3,857 Unforced errors and total points thread I want to continue the idea of HH from HH opening a thread to document the stats of total points and unforced errors (including double faults!) to calculate the aggressive margin value who shows the difference between forced points and unforced errors of a player in relation to the total points of the match (made by both players completely). The formula is: aggressive margin = [(total points player - (unforced errors + double fault opponent)) - unforced errors player ] / total points match Or more simple: AM = (forced points - unforced errors)/total match points This value is an indicator for the controlled offensive efforts of a player within a certain match. It shows in relation how many unforced errors a player is making when he is trying to dominate the match by either hitting winners or forcing errors of the opponent (compare with Otto Rehagels kontrollierter Offensive ). In this thread it would be enough to document the total points and the unforced errors/double faults of each player. This must be given, all other values can be calculated automatically. Winners and forced errors are summarized as forced points. So this thread could be a central database. The total points we get by wta stats, so very important would be to post TV stats including the UEs/DFs - if available. It would make sense to give a link to the source of the stats or to release a screenshot with the stats. Of course due to this forum section we are interested especially in the values of the German players but we should post the stats of any other players too to have data as much as possible for comparision. So we don't need any national restrictions. Anyone is invited to post the stats here. As an example I was calculating the values of Petko and Sabine yesterday: Petkovic def. Mattek Sands 64 75 Total points: 80-69 UEs (incl. DFs): 26-43 Source: http://www.tennisforum.com/showthread.php?t=635513 Lisicki def. Rybarikova 63 64 Total points: 71-58 UEs (incl. DFs): 36-26 Excel calculates the AM values: Petkovic vs. Mattek 7%/0% (BMS was exactly hitting the same amount of UEs as she was forcing points by her own!) Lisicki vs. Rybarikova 7%/-3% (Ryba was making too many errors due to her capability/willingness of forcing own points) Special thanks to HH from HH (who had the idea) and mk, who was calculating some AM values of the past right here! Would be nice if we could collect some data here.
 Dec 30th, 2013, 11:47 AM #2 mk27 Senior Member   Join Date: Jan 2002 Posts: 30,106 Re: Unforced errors and total points thread I think DFs are already included in the UEs.
Dec 30th, 2013, 12:13 PM   #3
Bino
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Quote:
 Originally Posted by mk27 I think DFs are already included in the UEs.
Really? I didn't know that. This would make it even a bit easier.

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Dec 30th, 2013, 12:19 PM   #4
mk27
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Re: Unforced errors and total points thread

Quote:
 Originally Posted by Bino Really? I didn't know that. This would make it even a bit easier. Sent from Verticalsports.com Free App
I think so, because aces are already included in the winners count as well.

Dec 30th, 2013, 12:24 PM   #5
Bino
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Quote:
 Originally Posted by mk27 I think so, because aces are already included in the winners count as well.
Ok this sounds very reasonable.

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Dec 31st, 2013, 08:18 AM   #6
mk27
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Re: Unforced errors and total points thread

Williams def. Petkovic 64 64
Total points: 78-66
UEs: 36-27

Quote:
 Originally Posted by matthias

 Jan 3rd, 2014, 03:50 AM #7 Bino Senior Member     Join Date: Jan 2013 Posts: 3,857 Re: Unforced errors and total points thread Agg Mar: Williams - Petkovic 10-2%
 Jan 3rd, 2014, 04:16 AM #8 Bino Senior Member     Join Date: Jan 2013 Posts: 3,857 Re: Unforced errors and total points thread Jankovic-Kerber 67 63 61 Total points: 120-95 UEs: 50-41 Source: Poseidon http://www.tennisforum.com/showpost....7&postcount=29 AM: 13-2% Relation forced/own points (FOP): 58/56% So Jankovic was playing just a bit more offensively (58-56) but was much more effective (13-2) by doing this.
 Jan 3rd, 2014, 12:09 PM #9 matthias Gaspa's Hubby     Join Date: Sep 2001 Posts: 74,646 Re: Unforced errors and total points thread ich kapier das nicht
Jan 3rd, 2014, 12:19 PM   #10
Ziva
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Re: Unforced errors and total points thread

Quote:
 Originally Posted by matthias ich kapier das nicht
Ich auch nicht

Das Quality Race ist noch schlimmer
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 Jan 3rd, 2014, 12:27 PM #11 mk27 Senior Member   Join Date: Jan 2002 Posts: 30,106 Re: Unforced errors and total points thread Wieso ist doch ganz einfach. Der AM berechnet sich aus Winners + Forced Errors - eigene UE und dann setzt man es in Relation zur Gesamtpunktzahl. Die Winners + Forced Errors bekommt man auch heraus, wenn man die gegnerischen UEs von den eigenen gewonnenen Punkte abzieht. Nehmen wir mal Petkovic als Beispiel gegen Williams. Petkovic machte 66 Punkte, davon waren 36 UEs von Williams, heißt also dass sie 30 Winners/FE gemacht hat. Jetzt muss man davon die eigenen UEs abziehen. Also 30 - 27 = 3. Und diese 3 setzte ich jetzt in Relation zur Gesamtpunktzahl, also 3:144 = 0,0208 = 2,08% Alles klar
Jan 3rd, 2014, 12:32 PM   #12
matthias
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Re: Unforced errors and total points thread

Quote:
 Originally Posted by mk27 Alles klar
ja ne, is klar jetzt

Jan 3rd, 2014, 12:38 PM   #13
KatjaS
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Re: Unforced errors and total points thread

Quote:
 Originally Posted by Ziva Das Quality Race ist noch schlimmer
Was genau denn?

 Jan 3rd, 2014, 12:41 PM #14 mk27 Senior Member   Join Date: Jan 2002 Posts: 30,106 Re: Unforced errors and total points thread Man muss nur alle Daten für diese Formel haben (eigene Winner + eigene FE - eigene UE)/Gesamtpunktzahl Man muss eben auch die UE berücksichtigen, weil es ja nichts nützt 80 Winners/FE zu schlagen und dabei dann 100 UE selbst zu machen. Wenn ich nur die Winners/FE in Relation zur Gesamtpunktzahl setze, dann werden immer Damen wie Barthel, Görges und Lisicki da sehr hohe Werte haben, egal ob sie gewinnen oder verlieren. Last edited by mk27 : Jan 3rd, 2014 at 12:52 PM.
Jan 3rd, 2014, 12:48 PM   #15
Ziva
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Re: Unforced errors and total points thread

Quote:
 Originally Posted by mk27 Wieso ist doch ganz einfach. Der AM berechnet sich aus Winners + Forced Errors - eigene UE und dann setzt man es in Relation zur Gesamtpunktzahl. Die Winners + Forced Errors bekommt man auch heraus, wenn man die gegnerischen UEs von den eigenen gewonnenen Punkte abzieht. Nehmen wir mal Petkovic als Beispiel gegen Williams. Petkovic machte 66 Punkte, davon waren 36 UEs von Williams, heißt also dass sie 30 Winners/FE gemacht hat. Jetzt muss man davon die eigenen UEs abziehen. Also 30 - 27 = 3. Und diese 3 setzte ich jetzt in Relation zur Gesamtpunktzahl, also 3:144 = 0,0208 = 2,08% Alles klar
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