| Singles | |
|---|---|
| 1991 Donnay Indoor Championships | |
| Champion |  Guy Forget |
| Runner-up |  Andrei Cherkasov |
| Final score | 6–3, 7–5, 3–6, 7–6 |
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.
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 | ||||||||||||||||||||||||
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.
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.
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.
Todd Martin was the defending champion but lost in the third round to Guy Forget.
Pete Sampras was the defending champion but did not compete that year.
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.
Joakim Nyström was the defending champion but lost in the third round to Jakob Hlasek.
Ivan Lendl was the defending champion and won in the final 6–3, 6–2 against Boris Becker.
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.
Guy Forget was the defending champion, but lost in the semifinals this year.
Boris Becker and Guy Forget were the defending champions, but Becker did not participate this year. Forget partnered Henri Leconte.
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.