1991 ATP Tour
The 1991 IBM ATP Tour was the elite tour for professional men's tennis organized by the ATP Tour. The IBM ATP Tour included the Grand Slam tournaments, the ATP Championship Series, Single-Week, the ATP Championship Series, the ATP World Series and the ATP Tour World Championships. The World Team Cup, Davis Cup and Grand Slam Cup are included in this calendar but did not count towards the Tour.
Schedule
This is the complete schedule of events on the 1991 IBM ATP Tour, with player progression documented from the quarterfinals stage.Key
January
February
March
April
May
June
July
August
September
October
November
December
| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists |
| 9 Dec | Grand Slam Cup Munich, Germany Grand Slam Cup |  David Wheaton7–5, 6–2, 6–4 | Michael Chang |  Michael Stich Ivan Lendl |  Todd Woodbridge Guy Forget Jakob Hlasek Patrick McEnroe |
ATP rankings
Statistical information
List of players and singles titles won, alphabetically by last name:- Andre Agassi - Orlando, Washington, D.C.
- Jordi Arrese - Madrid, Búzios
- Patrick Baur - Guarujá, Seoul
- Boris Becker - Australian Open, Stockholm Masters
- Sergi Bruguera - Estoril, Monte Carlo Masters, Athens
- Darren Cahill - San Francisco
- Paolo Canè - Bologna
- Omar Camporese - Rotterdam
- Michael Chang - Birmingham
- Andrei Cherkasov - Moscow
- Andrei Chesnokov - Canada Masters
- Jim Courier - Indian Wells Masters, Miami Masters, French Open
- Stefan Edberg - Stuttgart, Tokyo, London, US Open, Sydney Indoors, Tokyo Indoors
- Frédéric Fontang - Palermo
- Guy Forget - Sydney, Brussels, Cincinnati Masters, Bordeaux, Toulouse, Paris Masters
- Javier Frana - Guarujá
- Richard Fromberg - Wellington
- Andrés Gómez - Brasília
- Magnus Gustafsson - Munich, Båstad, Hilversum
- Jakob Hlasek - Basel
- Goran Ivanišević - Manchester
- Martín Jaite - Nice
- Petr Korda - New Haven, Berlin
- Richard Krajicek - Hong Kong
- Nicklas Kulti - Adelaide
- Leonardo Lavalle - Tel Aviv
- Ivan Lendl - Philadelphia, Memphis, Long Island
- John McEnroe - Chicago
- Christian Miniussi - São Paulo
- Thomas Muster - Florence, Geneva
- Karel Nováček - Auckland, Hamburg Masters, Kitzbühel, Prague
- Guillermo Pérez Roldán - San Marino
- Dimitri Poliakov - Umag
- Gianluca Pozzi - Brisbane
- Richey Reneberg - Tampa
- Christian Saceanu - Rosmalen
- Pete Sampras - Los Angeles, Indianapolis, Lyon, Season-Ending Championships
- Emilio Sánchez - Barcelona, Rome Masters, Gstaad
- Bryan Shelton - Newport
- Jan Siemerink - Singapore
- Carl-Uwe Steeb - Genova
- Michael Stich - Wimbledon, Stuttgart, Schenectady, Vienna
- Jonas Svensson - Copenhagen
- Alexander Volkov - Milan
- Jaime Yzaga - Charlotte
- Patrick Baur
- Sergi Bruguera
- Omar Camporese
- Frédéric Fontang
- Javier Frana
- Magnus Gustafsson
- Petr Korda
- Richard Krajicek
- Leonardo Lavalle
- Christian Miniussi
- Dimitri Poliakov
- Gianluca Pozzi
- Richey Reneberg
- Bryan Shelton
- Jan Siemerink
- Alexander Volkov