| Doubles | |
|---|---|
| 1991 Manchester Open | |
| Champions |  Omar Camporese  Goran Ivanišević |
| Runners-up |  Nick Brown Andrew Castle |
| Final score | 6–4, 6–3 |
Mark Kratzmann and Jason Stoltenberg were the defending champions, but did not participate this year.
Omar Camporese and Goran Ivanišević won the title, defeating Nick Brown and Andrew Castle 6–4, 6–3 in the final.
Gary Muller / 
Jim Pugh (first round) Jeremy Bates / 
Laurie Warder (semifinals) Kelly Jones / 
Jorge Lozano (first round) Omar Camporese / Goran Ivanišević (champions)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | G Muller J Pugh | 6 | 6 | ||||||||||||||||||||||||
 HJ Davids P Haarhuis | 7 | 7 | HJ Davids P Haarhuis | 7 | 6 | ||||||||||||||||||||||
| Q |  G Bloom A Mansdorf | 6 | 7 | Q | G Bloom A Mansdorf | 6 | 2 | ||||||||||||||||||||
| J Brown B Garnett | 4 | 5 | HJ Davids P Haarhuis | 6 | 4 | 6 | |||||||||||||||||||||
| 3 | K Jones J Lozano | 4 | 6 | 6 | WC | N Brown A Castle | 2 | 6 | 7 | ||||||||||||||||||
| J Grabb W Masur | 6 | 1 | 7 | J Grabb W Masur | 3 | 6 | |||||||||||||||||||||
| WC | N Brown A Castle | 6 | 3 | 7 | WC | N Brown A Castle | 6 | 7 | |||||||||||||||||||
 K Evernden  P Lundgren | 4 | 6 | 6 | WC | N Brown A Castle | 4 | 3 | ||||||||||||||||||||
| D Macpherson B Pearce | 7 | 6 | 6 | 4 | O Camporese G Ivanišević | 6 | 6 | ||||||||||||||||||||
| R Båthman R Bergh | 5 | 7 | 4 | D Macpherson B Pearce | 6 | 3 | 4 | ||||||||||||||||||||
| J Siemerink T Witsken | 7 | 6 | 5 | 4 | O Camporese G Ivanišević | 3 | 6 | 6 | |||||||||||||||||||
| 4 | O Camporese G Ivanišević | 6 | 7 | 7 | 4 | O Camporese G Ivanišević | 7 | 6 | 6 | ||||||||||||||||||
 L Mattar J Oncins | 6 | 6 | 2 | J Bates L Warder | 6 | 7 | 4 | ||||||||||||||||||||
| S Davis R Van't Hof | 3 | 4 | L Mattar J Oncins | 6 | 2 | ||||||||||||||||||||||
| S Kruger P Norval | 3 | 3 | 2 | J Bates L Warder | 7 | 6 | |||||||||||||||||||||
| 2 | J Bates L Warder | 6 | 6 | ||||||||||||||||||||||||
Stefan Edberg was the defending champion, but Ivan Lendl defeated him 6–3, 6–2, in the final.
Derrick Rostagno was the defending champion but lost in the semifinals to Goran Ivanišević.
Jeff Brown and Scott Melville were the defending champions but were forced to withdraw before the final against Petr Korda and Wally Masur.
Petr Korda was the defending champion but lost in the quarterfinals to Fabrice Santoro.
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.
Scott Davis and David Pate were the defending champions, but were defeated in the semifinals to fellow Americans Kelly Jones and Rick Leach.
Omar Camporese and Goran Ivanišević were the defending champions, but did not participate this year.
The men's doubles tournament at the 1991 US Open was held from August 26 to September 8, 1991, on the outdoor hard courts of the USTA National Tennis Center in New York City, United States. John Fitzgerald and Anders Järryd won the title, defeating Scott Davis and David Pate in the final.
Omar Camporese and Goran Ivanišević were the defending champions but withdrew on the semifinals in order to focus on the singles tournament, in which both players reached the Final.
Sergio Casal and Emilio Sánchez were the defending champions, but did not play this year.
Alexander Volkov was the defending champion, but lost in second round to Andrei Cherkasov.
Jakob Hlasek and Tomáš Šmíd were the defending champions but Hlasek did not compete this year, as he decided to focus on the singles tournament. Šmíd teamed up with Jan Gunnarsson and lost in the first round to tournament runners-up Omar Camporese and Claudio Mezzadri.
Andrés Gómez was the defending champion, but lost in the second round to Marcelo Filippini.
Andrés Gómez and Javier Sánchez were the defending champions, but Sánchez did not compete this year. Gómez teamed up with Sergi Bruguera and lost in the semifinals to Boris Becker and Eric Jelen.
Omar Camporese and Goran Ivanišević were the defending champions, but lost in the semifinals to Jakob Hlasek and Marc Rosset.
Sergio Casal and Emilio Sánchez successfully defended their title by defeating Carl-Uwe Steeb and Michael Stich in the final, 5–7, 6–4, 6–3.
Tomáš Šmíd and Petr Korda were the defending champions, but Korda chose not to participate. Šmid partnered Karel Nováček, but lost in the first round to Ronnie Bathman and Rikard Bergh.
Sergio Casal and Emilio Sánchez were the defending champions, but lost to Omar Camporese and Goran Ivanisevic in the quarterfinals. Camporese and Ivanisevic went on to win the title, defeating Luke Jensen and Laurie Warder in the finals, 6–2, 6–3.
Goran Ivanišević was the defending champion, but lost in the second round to Andrés Gómez.
Pieter Aldrich and Danie Visser were the defending champions, but Aldrich did not compete this year. Visser teamed up with Gary Muller and lost in the quarterfinals to Nick Brown and Richard Vogel.