| Doubles | |
|---|---|
| 1991 Swiss Indoors | |
| Champions |  Jakob Hlasek  Patrick McEnroe |
| Runners-up |  Petr Korda John McEnroe |
| Score | 3–6, 7–6, 7–6 |
| Draw | 16 (1Q) |
| Seeds | 4 |
Stefan Kruger and Christo van Rensburg were the defending champions, but van Rensburg did not compete this year. Kruger teamed up with Neil Broad and lost in the semifinals to Petr Korda and John McEnroe.
Jakob Hlasek and Patrick McEnroe won the title by defeating Korda and John McEnroe 3–6, 7–6, 7–6 in the final. [1]
Jakob Hlasek / Patrick McEnroe (champions)
Hendrik Jan Davids / Paul Haarhuis (first round) Tom Nijssen / Cyril Suk (first round)
Neil Broad / 
Stefan Kruger (semifinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | J Hlasek P McEnroe | 6 | 6 | ||||||||||||||||||||||||
 D Engel J Gunnarsson | 2 | 0 | 1 | J Hlasek P McEnroe | 6 | 6 | 7 | ||||||||||||||||||||
| J Bates K Curren | 7 | 4 | 6 | J Bates K Curren | 7 | 4 | 5 | ||||||||||||||||||||
| Q |  Ģ Dzelde  A Mronz | 6 | 6 | 4 | 1 | J Hlasek P McEnroe | 6 | 6 | |||||||||||||||||||
| 3 | T Nijssen C Suk | 6 | 6 | 3 | J Brown S Melville | 2 | 4 | ||||||||||||||||||||
L Pimek  P Wekesa | 4 | 7 | 6 | L Pimek P Wekesa | 1 | 7 | 3 | ||||||||||||||||||||
 J Lozano  G Luza | 6 | 3 | 4 | J Brown S Melville | 6 | 6 | 6 | ||||||||||||||||||||
| J Brown S Melville | 4 | 6 | 6 | 1 | J Hlasek P McEnroe | 3 | 7 | 7 | |||||||||||||||||||
| C Beckman S Salumaa | 6 | 7 | P Korda J McEnroe | 6 | 6 | 6 | |||||||||||||||||||||
 T Carbonell  D Macpherson | 2 | 6 | C Beckman S Salumaa | 6 | 7 | 6 | |||||||||||||||||||||
 A Mora B Talbot | 4 | 6 | 4 | N Broad S Kruger | 7 | 6 | 7 | ||||||||||||||||||||
| 4 | N Broad S Kruger | 6 | 7 | 4 | N Broad S Kruger | 6 | 5 | 6 | |||||||||||||||||||
 M Bahrami  O Delaître | 3 | 6 | 6 | P Korda J McEnroe | 4 | 7 | 7 | ||||||||||||||||||||
| M Schapers D Vacek | 6 | 4 | 3 | M Bahrami O Delaître | 3 | 4 | |||||||||||||||||||||
| P Korda J McEnroe | 6 | 6 | P Korda J McEnroe | 6 | 6 | ||||||||||||||||||||||
| 2 | HJ Davids P Haarhuis | 1 | 2 | ||||||||||||||||||||||||
Boris Becker and Jakob Hlasek were the defending champions, but Hlasek did not participate this year. Becker partnered Guy Forget, and they won the title, defeating Jim Grabb and Patrick McEnroe 4–6, 6–4, 6–3 in the final.
Jakob Hlasek and Anders Järryd were the defending champions, but did not participate together this year. Hlasek partnered Guy Forget, losing in the semifinals. Järryd partnered John Fitzgerald, losing in the second round.
Brad Gilbert and Vince Van Patten were the defending champions but only Gilbert competed that year with Kevin Curren.
John Fitzgerald and Anders Järryd were the defending champions but only Järryd competed that year with Jakob Hlasek.
Petr Korda was the defending champion but lost in the quarterfinals to Fabrice Santoro.
Petr Korda and Wally Masur were the defending champions but they competed with different partners that year, Korda with Jim Pugh and Masur with Mark Kratzmann.
Ken Flach and Robert Seguso were the defending champions but lost in the semifinals to John Fitzgerald and Anders Järryd.
John Fitzgerald and Anders Järryd were the defending champions but lost in the first round to Jonathan Canter and Bruce Derlin.
Todd Woodbridge and Mark Woodforde were the defending champions and won in the final 6–1, 6–3 against Ellis Ferreira and Patrick Galbraith.
Pieter Aldrich and Danie Visser were the defending champions, but lost in the first round to Paul Haarhuis and Mark Koevermans.
Scott Davis and David Pate won the title, defeating Patrick McEnroe and David Wheaton 6–1, 4–6, 6–4, 5–7, 9–7, in the final. This was Pate's first Grand Slam title and final, despite gaining the World No. 1 ranking two weeks earlier.
John Fitzgerald and Anders Järryd lost in the third round to McEnroe and Wheaton. It was their only Grand Slam loss of the year, as they would go on to win the following three majors in 1991.
Tom Nijssen and Cyril Suk were the defending champions, but lost in the semifinals this year.
Andrei Chesnokov defeated Petr Korda in the final, 3–6, 6–4, 6–3 to win the men's singles tennis title at the 1991 Canadian Open.
The men's doubles tournament at the 1989 French Open was held from 29 May until 11 June 1989 on the outdoor clay courts at the Stade Roland Garros in Paris, France. Jim Grabb and Patrick McEnroe won the title, defeating Mansour Bahrami and Éric Winogradsky in the final.
The men's doubles tournament at the 1989 US Open was held from August 28 to September 10, 1989, on the outdoor hard courts of the USTA National Tennis Center in New York City, United States. John McEnroe and Mark Woodforde won the title, defeating Ken Flach and Robert Seguso in the final.
The men's doubles tournament at the 1989 Australian Open was held from 16 through 29 January 1989 on the outdoor hard courts at the Flinders Park in Melbourne, Australia. Rick Leach and Jim Pugh won the title, defeating Darren Cahill and Mark Kratzmann in the final.
Tim Mayotte was the defending champion, but lost in the third round to Todd Witsken.
Todd Woodbridge and Mark Woodforde were the defending champions, but Woodbridge did not compete this year. Woodforde teamed up with Jason Stoltenberg and lost in the first round to tournament winners Andre Agassi and Petr Korda.
Bret Garnett and Jared Palmer were the defending champions, but Palmer chose to rest in order to compete at Montreal the following week. Garnett teamed up with Mike Briggs and lost in the second round to Mark Keil and Christo van Rensburg.
Udo Riglewski and Michael Stich were the defending champions, but lost in the quarterfinals to Jim Courier and Patrick Galbraith.
John McEnroe was the defending champion, but lost in the final to Jakob Hlasek. The score was 7–6(7–4), 6–0, 6–3.
1991: Jakob Hlasek Switzerland, Patrick McEnroe USA