| Singles | |
|---|---|
| 1991 Donnay Indoor Championships | |
| Champion |  Guy Forget |
| Runner-up |  Andrei Cherkasov |
| Score | 6–3, 7–5, 3–6, 7–6 |
| Draw | 32 |
| Seeds | 8 |
Boris Becker was the defending champion, but retired from his semifinals match this year.
Guy Forget won the title, defeating Andrei Cherkasov 6–3, 7–5, 3–6, 7–6 in the final. [1]
Boris Becker (semifinals, retired)
Stefan Edberg (semifinals)
Andre Agassi (first round) Guy Forget (champion) Jonas Svensson (first round) Andrei Chesnokov (quarterfinals) Michael Chang (quarterfinals)
Jakob Hlasek (quarterfinals)| Semifinals | Final | ||||||||||||||
| 1 | Boris Becker | 6 | 3 | 2r | |||||||||||
| WC | Andrei Cherkasov | 2 | 6 | 2 | |||||||||||
| WC | Andrei Cherkasov | 3 | 5 | 6 | 6 | ||||||||||
| 4 | Guy Forget | 6 | 7 | 3 | 7 | ||||||||||
| 4 | Guy Forget | 3 | 6 | 6 | |||||||||||
| 2 | Stefan Edberg | 6 | 0 | 3 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | B Becker | 6 | 3 | 6 | |||||||||||||||||||||||
| A Volkov | 4 | 6 | 3 | 1 | B Becker | 7 | 7 | ||||||||||||||||||||
| Q | E Jelen | 7 | 6 | Q | E Jelen | 6 | 6 | ||||||||||||||||||||
| Q |  S Doseděl | 6 | 3 | 1 | B Becker | 7 | 6 | ||||||||||||||||||||
| Q | A Boetsch | 6 | 2 | 6 | 7 | M Chang | 5 | 1 | |||||||||||||||||||
 H Skoff | 4 | 6 | 4 | Q | A Boetsch | 3 | 2 | ||||||||||||||||||||
 T Woodbridge | 4 | 3 | 7 | M Chang | 6 | 6 | |||||||||||||||||||||
| 7 | M Chang | 6 | 6 | 1 | B Becker | 6 | 3 | 2r | |||||||||||||||||||
| 3 | A Agassi | 3 | 6 | WC | A Cherkasov | 2 | 6 | 2 | |||||||||||||||||||
| Q | C Saceanu | 6 | 7 | Q | C Saceanu | 4 | 2 | ||||||||||||||||||||
| WC | A Cherkasov | 6 | 6 | WC | A Cherkasov | 6 | 6 | ||||||||||||||||||||
 J Aguilera | 2 | 2 | WC | A Cherkasov | 7 | 6 | |||||||||||||||||||||
| H Leconte | 7 | 4 | 2 | 6 | A Chesnokov | 5 | 1 | ||||||||||||||||||||
 G Prpić | 6 | 6 | 6 | G Prpić | 4 | 6 | |||||||||||||||||||||
| LL | C Bergström | 6 | 4 | 4 | 6 | A Chesnokov | 6 | 7 | |||||||||||||||||||
| 6 | A Chesnokov | 3 | 6 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | J Svensson | 0 | 4 | ||||||||||||||||||||||||
| M Rosset | 6 | 6 | M Rosset | 6 | 6 | ||||||||||||||||||||||
| C-U Steeb | 2 | 5 |  R Agénor | 4 | 3 | ||||||||||||||||||||||
| R Agénor | 6 | 7 | M Rosset | 2 | 5 | ||||||||||||||||||||||
| WC |  E Masso | 6 | 6 | 6 | 4 | G Forget | 6 | 7 | |||||||||||||||||||
| R Fromberg | 3 | 7 | 3 | WC | E Masso | 1 | 2 | ||||||||||||||||||||
 A Mansdorf | 6 | 3 | 3 | 4 | G Forget | 6 | 6 | ||||||||||||||||||||
| 4 | G Forget | 4 | 6 | 6 | 4 | G Forget | 3 | 6 | 6 | ||||||||||||||||||
| 8 | J Hlasek | 6 | 6 | 2 | S Edberg | 6 | 0 | 3 | |||||||||||||||||||
| M Larsson | 3 | 2 | 8 | J Hlasek | 6 | 7 | |||||||||||||||||||||
| M Wilander | 6 | 7 | M Wilander | 1 | 5 | ||||||||||||||||||||||
 O Camporese | 4 | 6 | 8 | J Hlasek | 1 | 2 | |||||||||||||||||||||
| K Nováček | 6 | 6 | 3 | 2 | S Edberg | 6 | 6 | ||||||||||||||||||||
| WC | P Cash | 2 | 7 | 6 | WC | P Cash | 6 | 1 | 4 | ||||||||||||||||||
| M Gustafsson | 0 | 4 | 2 | S Edberg | 3 | 6 | 6 | ||||||||||||||||||||
| 2 | S Edberg | 6 | 6 | ||||||||||||||||||||||||
Jim Courier defeated Andre Agassi in the final, 3–6, 6–4, 2–6, 6–1, 6–4 to win the men's singles tennis title at the 1991 French Open. It was his first major singles title.
Michael Stich defeated Boris Becker in the final, 6–4, 7–6(7–4), 6–4 to win the gentlemen's singles tennis title at the 1991 Wimbledon Championships. It was his first and only major singles title.
Boris Becker defeated the two-time defending champion Ivan Lendl in the final, 1–6, 6–4, 6–4, 6–4 to win the men's singles tennis title at the 1991 Australian Open. It was his first Australian Open title and fifth major singles title overall.
Sergi Bruguera defeated Cédric Pioline in the final, 7–6(7–2), 6–0 to win the singles tennis title at the 1993 Monte Carlo Open.
Pete Sampras was the defending champion but did not compete that year.
Stefan Edberg was the defending champion but lost in the semifinals to Shuzo Matsuoka.
Jim Courier defeated Carlos Costa in the final, 7–6(7–3), 6–0, 6–4 to win the men's singles tennis title at the 1992 Italian Open.
Goran Ivanišević defeated Guy Forget in the final, 7–6(7–2), 4–6, 7–6(7–5), 6–2 to win the singles tennis title at the 1992 Stockholm Open.
Boris Becker defeated the defending champion Guy Forget in the final, 7–6(7–3), 6–3, 3–6, 6–3 to win the singles tennis title at the 1992 Paris Open.
Michael Stich defeated Andrei Chesnokov in the final, 6–3, 6–7(1–7), 7–6(9–7), 6–4 to win the 1993 Hamburg European Open.
Boris Becker defeated Stefan Edberg in the final, 6–4, 6–0, 6–3 to win the singles tennis title at the 1990 Stockholm Open.
Stefan Edberg won the singles tennis title at the 1990 Paris Open after the defending champion Boris Becker retired in the final, with the scoreline at 3–3.
Tennis championship held in 1987. Ivan Lendl was the defending champion but lost in the final 7–5, 6–2, 7–5 to Miloslav Mečíř.
Sergi Bruguera defeated Boris Becker in the final, 5–7, 6–4, 7–6(8–6), 7–6(7–4) to win the singles tennis title at the 1991 Monte Carlo Open.
Aaron Krickstein was the defending champion, but lost in the second round this year.
Emilio Sánchez and Slobodan Živojinović were the defending champions, but Sánchez did not participate this year. Živojinović partnered Boris Becker, withdrawing prior to their semifinals match.
Jim Courier defeated David Wheaton in the final, 4–6, 6–3, 6–4 to win the men's singles tennis title at the 1991 Miami Open.
Guy Forget defeated Pete Sampras in the final, 2–6, 7–6(7–4), 6–4 to win the singles tennis title at the 1991 Cincinnati Masters.
Andrés Gómez was the defending champion, but lost in the second round to Marcelo Filippini.
Boris Becker was the defending champion, but lost in the final to Pete Sampras. The score was 7–6(7–2), 3–6, 6–3.