| Singles | |
|---|---|
| 1988 Midland Group Championships | |
| 1987 Champion |  Gabriela Sabatini |
| Champion |  Steffi Graf |
| Runner-up |  Manuela Maleeva |
| Score | 6–2, 6–0 |
Gabriela Sabatini was the defending champion but did not compete that year.
Steffi Graf won in the final 6–2, 6–0 against Manuela Maleeva.
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
Steffi Graf (champion)
Pam Shriver (semifinals)
Manuela Maleeva (final) Claudia Kohde-Kilsch (quarterfinals) Lori McNeil (semifinals) Sylvia Hanika (quarterfinals)
Sandra Cecchini (quarterfinals)
Nathalie Tauziat (quarterfinals)| First round | Second round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||||||||
| 1 | S Graf | 6 | 6 | |||||||||||||||||||||||||||||||
 I Budařová | 3 | 2 | 1 | S Graf | 6 | 6 | ||||||||||||||||||||||||||||
| Q |  C Dahlman | 7 | 5 | 4 |  H Witvoet | 1 | 1 | |||||||||||||||||||||||||||
| H Witvoet | 6 | 7 | 6 | 1 | S Graf | 6 | 6 | |||||||||||||||||||||||||||
| LL | S Auer | 4 | 6 | 4 | 8 | N Tauziat | 3 | 2 | ||||||||||||||||||||||||||
 J Durie | 6 | 4 | 6 | J Durie | 3 | 3 | ||||||||||||||||||||||||||||
 C Cohen | 6 | 5 | 1 | 8 | N Tauziat | 6 | 6 | |||||||||||||||||||||||||||
| 8 | N Tauziat | 2 | 7 | 6 | 1 | S Graf | 6 | 5 | 6 | |||||||||||||||||||||||||
| 4 | C Kohde-Kilsch | 6 | 6 | 5 | L McNeil | 2 | 7 | 4 | ||||||||||||||||||||||||||
| L Golarsa | 1 | 2 | 4 | C Kohde-Kilsch | 7 | 6 | ||||||||||||||||||||||||||||
 E Reinach | 2 | 0 | Q | C Wood | 5 | 1 | ||||||||||||||||||||||||||||
| Q | C Wood | 6 | 6 | 4 | C Kohde-Kilsch | 2 | 3 | |||||||||||||||||||||||||||
| P Langrová | 1 | 3 | 5 | S Martin | 6 | 6 | ||||||||||||||||||||||||||||
| S Gomer | 6 | 6 | S Gomer | 4 | 2 | |||||||||||||||||||||||||||||
| S Meier | 6 | 0 | 1 | 5 | L McNeil | 6 | 6 | |||||||||||||||||||||||||||
| 5 | L McNeil | 4 | 6 | 6 | 1 | Steffi Graf | 6 | 6 | ||||||||||||||||||||||||||
| 7 | S Cecchini | 6 | 6 | 3 | Manuela Maleeva | 2 | 0 | |||||||||||||||||||||||||||
| J Salmon | 1 | 4 | 7 | S Cecchini | 6 | 3 | 6 | |||||||||||||||||||||||||||
| N Herreman | 7 | 6 | 6 | N Herreman | 2 | 6 | 4 | |||||||||||||||||||||||||||
| A Grunfeld | 5 | 7 | 2 | 7 | S Cecchini | 3 | 2 | |||||||||||||||||||||||||||
| C Caverzasio | 2 | 6 | 1 | 3 | M Maleeva | 6 | 6 | |||||||||||||||||||||||||||
| I Demongeot | 6 | 0 | 6 | I Demongeot | 3 | 1 | ||||||||||||||||||||||||||||
| Q | M Strandlund | 4 | 1 | 3 | M Maleeva | 6 | 6 | |||||||||||||||||||||||||||
| 3 | M Maleeva | 6 | 6 | 3 | M Maleeva | 7 | 2 | |||||||||||||||||||||||||||
| 6 | S Hanika | 6 | 6 | 2 | P Shriver | 6 | 1 | r | ||||||||||||||||||||||||||
| W Probst | 1 | 2 | 6 | S Hanika | 6 | 6 | ||||||||||||||||||||||||||||
| C Tanvier | 5 | 2 | Q | J Pospíšilová | 3 | 3 | ||||||||||||||||||||||||||||
| Q | J Pospíšilová | 7 | 6 | 6 | S Hanika | 5 | 2 | |||||||||||||||||||||||||||
 B Cordwell | 3 | 6 | 4 | 2 | P Shriver | 7 | 6 | |||||||||||||||||||||||||||
| L Garrone | 6 | 4 | 6 | L Garrone | 0 | 0 | ||||||||||||||||||||||||||||
| M Javer | 4 | 0 | 2 | P Shriver | 6 | 6 | ||||||||||||||||||||||||||||
| 2 | P Shriver | 6 | 6 | |||||||||||||||||||||||||||||||
Gabriela Sabatini defeated the two-time defending champion Steffi Graf in the final, 6–2, 7–6(7–4) to win the women's singles tennis title at the 1990 US Open. It was her first and only major singles title, despite reaching eighteen semifinals and three finals during her career. The final was a rematch of the 1988 final and the 1989 semifinals. Sabatini became the first Argentine to win the title.
Steffi Graf won in the final 6–4, 6–1 against Katerina Maleeva.
Steffi Graf was the defending champion and won in the final 6–4, 6–4 against Chris Evert.
Steffi Graf was the defending champion but did not compete that year.
Steffi Graf was the defending champion but lost in the semifinals to Gabriela Sabatini.
Steffi Graf defeated the defending champion Martina Navratilova in the final, 6–2, 6–4 to win the singles tennis title at the 1994 Pan Pacific Open.
Martina Navratilova was the defending champion of the singles title at the Virginia Slims of Washington tennis tournament but did not compete that year.
Steffi Graf was the defending champion and won in the final 6–1, 6–4 against Ann Henricksson.
Steffi Graf was the defending champion but did not compete that year.
Steffi Graf was the defending champion and won the final on a walkover against Jana Novotná.
Steffi Graf was the defending champion going into the final against her rival Gabriela Sabatini. Just the previous month, Sabatini defeated Steffi Graf 3–6, 6–3, 7–5 in the final at Amelia Island, Florida. Now, in her native Germany, Steffi would turn the tables against Sabatini, beating her 6–3, 6–1. Prior to this match, Sabatini had played in four finals in 1989, with her winning twice. For Steffi, this victory was her seventh of the year, and marked the sixteenth time out of nineteen matches she had beaten Sabatini.
Steffi Graf was the defending champion and won in the final 6–4, 6–2 against Katerina Maleeva.
Manuela Maleeva was the defending champion but lost in the second round to Catarina Lindqvist.
Steffi Graf was the defending champion but did not compete that year.
Gabriela Sabatini defeated Pam Shriver in the final, 7–5, 6–2, 6–2 to win the singles tennis title at the 1988 Virginia Slims Championships.
Steffi Graf was the six-time defending champion, but she lost to Arantxa Sánchez Vicario in the final, 6–3, 6–3.
Steffi Graf defeated Martina Navratilova in the final, 6–4, 7–5, 2–6, 6–2 to win the singles tennis title at the 1989 Virginia Slims Championships. It was her second Tour Finals singles title.
Top-seeded Steffi Graf claimed the title and $38,000 prize money by defeating Gabriela Sabatini in the final, after saving one match point.
Fifth-seeded pair Steffi Graf and Gabriela Sabatini claimed the title by defeating Gigi Fernández and Robin White in the final.
Steffi Graf defeated Jennifer Capriati in the final, 6–1, 0–6, 6–3 to win the women's singles tennis title at the 1993 Canadian Open.