On an extensive research, here are Arantxa's achievements from 1990-1993 (early 90's), BTW I was quite amazed:
-Retired in her 1st ever match from injury against Zvereva in Fed Cup (Finalist in Fed Cup)
-Won 2 Singles titles (won 1st grass title), finalist in 5 (4 was against Steffi!)
-Won 4 doubles titles, finalist in 3 (inc. Chase Champ.)
-Won 2nd Grand Slam (mixed)
-Defeats Martina N. for the 1st time (hamburg), 0-5 against Graf for the year
-Defeats Graf in SF at French Open 6-0, 6-2 (Graf's worst defeat since 1984) (Graf's next worst loss came in 1997!)
-Finalist of French Open (singles and mixed), finalist in mixed at Australian Open
-Won Fed Cup
-Won 1 singles title, finalist in 4
-Won 2 doubles titles, finalist in 1
-DID NOT LOSE before the QF's in ANY tournament!
(out of 16 tournaments reached the SF's or better in 13!)
-W/L Record: 60-15!
-Won Bronze and Silver at Barcelona Olympic games
-Won 7 consecutive doubles titles!!
(9 overall) finalist in 3 (won doubles in Austalian Open and Chase Champ., finalist in dubs at French Open)
-Finalist in Fed Cup to Germany
-Won 2 singles titles, finalist in 6 (won French Open in mixed, finalist in mixed at Australian Open)
-Defeated Monica Seles for the 1st time(Canada)
-only lost before the QF's ONCE in 18 tournaments (reached the SF's or better in 15 tourneys!!)
-Won Miami title without dropping a set (6 rounds)
-ended the year #2 in the world
-Lost in the SF's of 7 tournaments (out of 18, reached 4 consecutive SF's) 9-7 record in SF's (reached the SF's in 16 of 18 tourneys played), (SF in Aussie, French, and U.S. Open)
-Won 4 singles titles, finalist in 5
-Won 4 doubles titles, finalist in 2 (won U.S. Open)
-competed in 91 singles matches (won 77), the most matches played since 1986 by Navratilova (92)
-tiebreak record 9-6
-Reached the finals of 8 out of 11 consecutive tourneys
-Won Australian Open (mixed)
-W/L record 77-14!