The 1981 Bristol Open, also known by its sponsored name Lambert & Butler Championships, was a tennis tournament played on outdoor grass courts that was part of the 1981 Volvo Grand Prix. It was played at Bristol in Great Britain and was held from 15 June until 20 June 1981. Unseeded Mark Edmondson won the singles title.
The 1981 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts in Brussels, Belgium. It was a WCT tournament that was part of the 1981 Volvo Grand Prix circuit. It was the inaugural edition of the tournament and was held from 9 March until 15 March 1981. Second-seeded Jimmy Connors won the singles title.
The 1982 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts in Brussels in Belgium the event was part of the 1982 Volvo Grand Prix. It was the second edition of the tournament and was held from 8 March through 14 March 1982. Third-seeded Vitas Gerulaitis won the singles title.
The 1983 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts in Brussels in Belgium the event was part of the 1983 Volvo Grand Prix. The tournament was held from 7 March through 13 March 1983. Fifth-seeded Peter McNamara defeated Ivan Lendl in the final of the singles event, despite trailing 4–5 and 0–30 on Lendl's serve, to win the title and the accompanying $50,000 first-prize money.
The 1986 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts at the Forest National in Brussels, Belgium the event was part of the 1986 Nabisco Grand Prix. It was the sixth edition of the tournament and was held from 13 March until 23 March 1986. First-seeded Mats Wilander won the singles title.
The 1990 Belgian Indoor Championships was a tennis tournament played on indoor carpet courts. It was the 9th edition of the event known that year as the Belgian Indoor Championships, and was part of the ATP Championship Series, double-week events of the 1990 ATP Tour, running concurrently with the 1990 SkyDome World Tennis Tournament. It took place at the Forest National in Brussels, Belgium, from 12 February until 18 February 1990. First-seeded Boris Becker won the singles title.
The 1981 Volvo Grand Prix was the only men's professional tennis circuit held that year. It consisted of the four Grand Slam tournaments and the Grand Prix tournaments. The World Championship Tennis (WCT) Tour was incorporated into the Grand Prix circuit. The WCT tour consisted of eight regular tournaments, a season's final, three tournaments categorized as special events and a doubles championship. In total 89 tournaments were held divided over 29 countries. The circuit was administered by the Men's International Professional Tennis Council (MIPTC).
The 1981 Seiko World Super Tennis also known as the Tokyo Indoor was a men's tennis tournament played on indoor carpet courts at the Yoyogi National Stadium in Tokyo, Japan that was part of the Super Series of the 1981 Volvo Grand Prix circuit. The tournament was held from 26 October through 30 October 1981. Matches were the best of three sets. Unseeded Vincent Van Patten won the singles titles. On his way to the final he defeated seeded players José Luis Clerc (3), Vitas Gerulaitis (5), and John McEnroe (1).
Marko Ostoja is a former professional tennis player from Croatia who competed for Yugoslavia.
Thierry Stevaux is a former professional tennis player from Belgium.
The 1981 Suisse Open Gstaad was a men's tennis tournament played on outdoor clay courts in Gstaad, Switzerland. It was the 36th edition of the tournament and was held from 6 July through 12 July 1981. The tournament was part of the 1981 Volvo Grand Prix tennis circuit. Third-seeded Wojciech Fibak won the singles title.
The 1981 Alan King Tennis Classic, also known as the Alan King-Caesars Palace Tennis Classic, was a men's tennis tournament played on outdoor hard courts at the Caesars Palace in Las Vegas, United States. It was the tenth edition of the event and was part of the Super Series of the 1981 Volvo Grand Prix circuit. The tournament was held from April 20 through April 26, 1981. First-seeded Ivan Lendl won the singles title and the accompanying $60,000 first-prize money.
The 1981 Washington Star International was a men's tennis tournament and was played on outdoor clay courts. The event was part of the 1981 Grand Prix circuit. It was the 13th edition of the tournament and was held at Rock Creek Park in Washington, D.C. from July 20 through July 26, 1981. Third-seeded José Luis Clerc won the singles title.
The 1981 United Bank Classic, also known as the Denver WCT, was a men's tennis tournament played on indoor carpet courts in Denver, Colorado in the United States that was part of the 1981 Grand Prix circuit. It was the tenth edition of the tournament and took place from March 2 through March 8, 1981. First-seeded Gene Mayer won the singles competition.
The 1981 U.S. Pro Tennis Championships was a men's tennis tournament played on outdoor green clay courts at the Longwood Cricket Club in Chestnut Hill, Massachusetts, United States. The event was part of the Super Series of the 1981 Volvo Grand Prix circuit. It was the 54th edition of the tournament and was held from July 13 through July 19, 1981. First-seeded José Luis Clerc won the singles title.
The 1981 Transamerica Open, also known as the Pacific Coast Championships, was a men's tennis tournament played on indoor carpet courts at the Cow Palace in San Francisco, California in the United States. The event was part of the Super Series of the 1981 Volvo Grand Prix circuit. It was the 91st edition of the tournament and was held from September 21 through September 27, 1981. Fifth-seeded Eliot Teltscher won the singles title and earned $32,000 first-prize money.
The 1977 Belgian International Championships was a men's tennis tournament staged at the Leopold Club in Brussels, Belgium that was part of the Grand Prix circuit and categorized as a Two star event. The tournament was played on outdoor clay courts and was held from 6 June until 12 June 1977. It was the sixth edition of the tournament and first-seeded Harold Solomon won the singles title.
The 1978 Belgian International Championships was a men's tennis tournament staged at the Leopold Club in Brussels, Belgium that was part of the Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 12 June until 18 June 1978. It was the seventh edition of the tournament and unseeded Werner Zirngibl, who entered the competition as a qualifier, won the singles title.
The 1979 Belgian International Championships was a men's tennis tournament staged at the Leopold Club in Brussels, Belgium that was part of the Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 11 June until 17 June 1979. It was the eighth edition of the tournament and second-seeded Balázs Taróczy won the singles title.
The 1980 Belgian International Championships was a men's tennis tournament staged at the Leopold Club in Brussels, Belgium that was part of the Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 9 June until 15 June 1980. It was the ninth edition of the tournament and third-seeded Peter McNamara won the singles title.
Marko Ostoja [1] 
Ricardo Cano / 
Andrés Gómez [2] 
