| 4 Jan | Australian Men's Hardcourt Championships
Adelaide, Australia
ATP World Series
Hard – $157,500 – 32S/16D
Singles – Doubles | 
February| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 1 Feb | Dubai Tennis Championships
Dubai, UAE
ATP World Series
Hard – $1,000,000 – 32S/16D
Singles – Doubles | 
March| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 1 Mar | Copenhagen Open
Copenhagen, Denmark
ATP World Series
Carpet – $175,000 – 32S/16D
Singles – Doubles |  |1991
April| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 5 Apr | Torneo Godó
Barcelona, Spain
ATP Championship Series
Clay – $750,000 – 56S/28D
Singles – Doubles | 
May| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 3 May | Hamburg Masters
Hamburg, Germany
ATP Championship Series, Single Week
Clay – $1,450,000 – 56S/28D
Singles – Doubles | 
June| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 7 Jun | Trofeo Kim Top Line
Florence, Italy
ATP World Series
Clay – $275,500 – 32S/16D | 
July| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 5 Jul | Gstaad, Switzerland
ATP World Series
Clay – $375,000 – 32S/16D | 
August| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 2 Aug | Philips Head Cup
Kitzbühel, Austria
ATP World Series
Clay – $375,000 – 48S/24D |
September| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 13 Sep | Bucharest, Romania
ATP World Series
Clay – $500,000 – 32S/16D | 
October| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 4 Oct | Australian Indoor Championships
Sydney, Australia
ATP Championship Series
Hard – $875,000 – 32S/16D
Singles – Doubles | 
December| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists | | 6 Dec | Grand Slam Cup
Munich, Germany
Grand Slam Cup
Carpet – $6,000,000 – 16S |
Statistical informationList of players and titles won, alphabetically by last name:
- Chuck Adams - Seoul
- Andre Agassi - San Francisco, Scottsdale
- Jordi Arrese - Athens
- Boris Becker - Doha, Milan
- Alberto Berasategui - São Paulo
- Arnaud Boetsch - Rosmalen, Toulouse
- Sergi Bruguera - Monte Carlo Masters, French Open, Gstaad, Prague, Bordeaux
- Jordi Burillo - Bologna
- Michael Chang - Jakarta, Osaka, Cincinnati Masters, Kuala Lumpur Indoors, Beijing
- Carlos Costa - Hilversum, Buenos Aires
- Jim Courier - Australian Open, Memphis, Indian Wells Masters, Rome Masters, Indianapolis
- Stefan Edberg - Madrid
- Jacco Eltingh - Atlanta
- Thomas Enqvist - Schenectady
- Javier Frana - Santiago
- Marc-Kevin Goellner - Nice
- Magnus Gustafsson - Stuttgart
- Goran Ivanišević - Bucharest, Vienna, Paris Masters
- Anders Järryd - Rotterdam
- Richard Krajicek - Los Angeles
- Aaron Krickstein - Durban
- Nicklas Kulti - Adelaide
- Henri Leconte - Halle
- Ivan Lendl - Munich, Tokyo Indoors
- Amos Mansdorf - Washington, D.C.
- Todd Martin - Coral Springs
- Andrei Medvedev - Estoril, Barcelona, New Haven
- Thomas Muster - Mexico City, Florence, Genova, Kitzbühel, San Marino, Umag, Palermo
- Karel Nováček - Dubai, Zaragoza
- Andrei Olhovskiy - Copenhagen
- Horacio de la Peña - Charlotte
- Guillermo Pérez Roldán - Casablanca
- Mikael Pernfors - Canada Masters
- Stefano Pescosolido - Tel Aviv
- Richey Reneberg - Kuala Lumpur
- Marc Rosset - Marseille, Long Island, Moscow
- Greg Rusedski - Newport
- Pete Sampras - Sydney, Miami Masters, Tokyo, Hong Kong, Wimbledon, US Open, Lyon, Antwerp
- Horst Skoff - Båstad
- Jonathan Stark - Bolzano
- Michael Stich - Stuttgart, Hamburg Masters, London, Basel, Stockholm Masters, Season-Ending Championships
- Jason Stoltenberg - Manchester
- Alexander Volkov - Auckland
- Mark Woodforde - Philadelphia
- Jaime Yzaga - Tampa, Sydney Indoors
The following players won their first title:
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