1990 ATP Tour
The 1990 IBM ATP Tour was the first season of the ATP Tour, the newly formed tennis circuit which came in to replace the Grand Prix and WCT tournaments. It was the elite tour for professional tennis organized by the Association of Tennis Professionals. In 1990 the IBM ATP Tour included the four Grand Slam tournaments, the ATP Tour World Championships, the ATP Championship Series, Single-Week, the ATP Championship Series and the ATP World Series. The World Team Cup and Davis Cup are included in this calendar but did not count towards the Tour.
Schedule
This is the complete schedule of events on the 1990 IBM ATP Tour, with player progression documented from the quarterfinals stage.;Key
| Grand Slam |
| ATP Tour World Championships |
| Grand Slam Cup |
| ATP Championship Series, Single-Week |
| ATP Championship Series |
| ATP World Series |
| Team Events |
January
February
March
April
May
June
July
August
September
October
November
December
| Week | Tournament | Champions | Runners-up | Semifinalists | Quarterfinalists |
| 10 Dec | Grand Slam Cup Munich, Germany Grand Slam Cup $6,000,000 – Carpet – 16S Singles |  Pete Sampras6–3, 6–4, 6–2 | Brad Gilbert | Michael Chang David Wheaton |  Henri Leconte Goran Ivanišević Aaron Krickstein Ivan Lendl |
ATP rankings
Statistical information
List of players and titles won, alphabetically by last name:- Andre Agassi - San Francisco, Miami Masters, Washington, D.C., Season-Ending Championships
- Ronald Agénor - Genova, Berlin
- Juan Aguilera - Nice, Hamburg Masters
- Pieter Aldrich - Newport
- Alex Antonitsch - Seoul
- Jordi Arrese - San Remo, Prague
- Boris Becker - Brussels, Stuttgart, Indianapolis, Sydney Indoors, Stockholm Masters
- Pat Cash - Hong Kong
- Michael Chang - Canada Masters
- Andrei Cherkasov - Moscow
- Andrei Chesnokov - Monte Carlo Masters, Tel Aviv
- Francisco Clavet - Hilversum
- Stefan Edberg - Indian Wells Masters, Tokyo, Wimbledon, Los Angeles, Cincinnati Masters, Long Island, Paris Masters
- Franco Davín - Palermo
- Scott Davis - Auckland
- Guy Forget - Bordeaux
- Richard Fromberg - Bologna, Båstad
- Brad Gilbert - Rotterdam, Orlando, Brisbane
- Andrés Gómez - Barcelona, Madrid, French Open
- Jakob Hlasek - Wembley
- Goran Ivanišević - Stuttgart
- Martín Jaite - Guaruja, Gstaad
- Anders Järryd - Vienna
- Kelly Jones - Singapore
- Mark Koevermans - Athens
- Ramesh Krishnan - Schenectady
- Magnus Larsson - Florence
- Ivan Lendl - Australian Open, Milan, Toronto, London, Tokyo Indoors
- Amos Mansdorf - Rosmalen
- Luiz Mattar - Rio de Janeiro
- John McEnroe - Basel
- Thomas Muster - Adelaide, Casablanca, Rome Masters
- Yannick Noah - Sydney
- Karel Nováček - Munich
- Horacio de la Peña - Kitzbühel
- Guillermo Pérez Roldán - San Marino
- Goran Prpić - Umag
- Marc Rosset - Lyon
- Derrick Rostagno - New Haven
- Pete Sampras - Philadelphia, Manchester, US Open, Grand Slam Cup
- Emilio Sánchez - Wellington, Estoril
- Horst Skoff - Geneva
- Michael Stich - Memphis
- Jonas Svensson - Toulouse
- Robbie Weiss - São Paulo
- David Wheaton - Kiawah Island
- Mats Wilander - Itaparica
- Pieter Aldrich
- Alex Antonitsch
- Jordi Arrese
- Andrei Cherkasov
- Francisco Clavet
- Richard Fromberg
- Goran Ivanišević
- Mark Koevermans
- Magnus Larsson
- Goran Prpić
- Derrick Rostagno
- Pete Sampras
- Michael Stich
- David Wheaton
- Robbie Weiss