The 1978 Romika Cup was a men's Grand Prix Tennis Circuit tournament held in Munich, West Germany. It was the 62nd edition of the tournament and was held from 23 May through 28 May 1978. It is now part of the ATP Tour. First-seeded Guillermo Vilas won the singles title, his second after 1975.
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 1984 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts in Brussels in Belgium the event was part of the 1984 Volvo Grand Prix. It was the fourth edition of the tournament and was held from 5 March until 11 March 1984. Second-seeded John McEnroe won the singles title.
The 1985 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 1985 Nabisco Grand Prix. It was the fifth edition of the tournament and was held from 11 March until 17 March 1985. Second-seeded Anders Järryd won the singles title.
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 1987 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 1987 Nabisco Grand Prix. It was the seventh edition of the tournament and was held from 23 March until 29 March 1987. Second-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 1991 Donnay Indoor Championships was a men's tennis tournament played on indoor carpet courts at the Forest National in Brussels, Belgium which was part of the 1990 ATP Tour. It was the 10th edition of the tournament and was held from 11 February until 17 February 1991. Fourth-seeded Guy Forget won the singles title.
The 1992 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 1992 ATP Tour. It was the 11th and last edition of the tournament and was held from 10 February until 16 February 1992. Third-seeded Boris Becker won the singles title, his second at the event after 1990.
The 1978 Monte Carlo Open was a men's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France. The tournament was part of the WCT Tour, which was incorporated into the 1978 Colgate-Palmolive Grand Prix circuit. It was the 72nd edition of the event and was held from 10 April through 16 April 1978. Raúl Ramírez, the no. 5 seed, won the singles title.
The 1978 Suisse Open Gstaad was a men's tennis tournament played on outdoor clay courts in Gstaad, Switzerland. It was the 33rd edition of the tournament and was held from 10 July through 16 July 1978. The tournament was part of the Grand Prix tennis circuit with a total prize money available of $75,000. First-seeded Guillermo Vilas won the singles title, his second at the tournament after 1974.
Werner Zirngibl is a former professional tennis player from Germany.
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 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.
The 1981 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 8 June until 14 June 1981. It was the tenth and last edition of the tournament and third-seeded Marko Ostoja won the singles title.
The 1972 Belgian Open 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 Group C event. The tournament was played on outdoor clay courts and was held from 8 May until 4 May 1972. It was the sixth edition of the tournament and Manuel Orantes won the singles title.
The 1971 Belgian Open 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 Group B event. The tournament was played on outdoor clay courts and was held from 17 May until 23 May 1971. It was the fifth edition of the tournament and Cliff Drysdale won the singles title.
Werner Zirngibl [1] 
Antonio Zugarelli / 
Jean-Louis Haillet [2] 
