The 1974 South American Championships was a men's tennis tournament for male players that was part of the 1974 Commercial Union Assurance Grand Prix. It was played in Buenos Aires, Argentina, and held from 18 November through 24 November 1974. First-seeded Guillermo Vilas won the singles title.
The first 1977 ATP Buenos Aires, also known as the River Plate Championships, was an Association of Tennis Professionals men's tennis tournament that was played on outdoor clay courts at the Buenos Aires Lawn Tennis Club in Buenos Aires, Argentina and held from 14 April through 17 April 1977. First-seeded Guillermo Vilas won the singles title.
The second 1977 ATP Buenos Aires was a men's tennis tournament held in Buenos Aires, Argentina that was part of the Grand Prix circuit and played on outdoor clay courts. It was the 11th edition of the tournament and was held from 21 November through 27 November 1977. First-seeded Guillermo Vilas won the singles title.
The 1979 ATP Buenos Aires was a men's Grand Prix tennis circuit tournament held in Buenos Aires, Argentina that was played on outdoor clay courts. It was the 13th edition of the tournament and was held from 19 November through 25 November 1979. Guillermo Vilas won the singles title.
The 1981 South American Championships was a men's tennis tournament held in Buenos Aires, Argentina. It was the 15th edition of the tournament and was played on outdoor clay courts. The tournament was part of the 1981 Volvo Grand Prix and started was held from 16 November until 22 November 1981. First-seeded Ivan Lendl won the singles title.
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 Volvo International was a men's tennis tournament played on outdoor clay courts in North Conway, New Hampshire in the United States and was part of the 1981 Volvo Grand Prix. The tournament ran from July 28 through August 3, 1981. José Luis Clerc won the singles title.
The 1982 ABN World Tennis Tournament was a tennis tournament played on indoor carpet courts at the Rotterdam Ahoy in the Netherlands. It was part of the 1982 Volvo Grand Prix circuit. It was the 10th edition of the tournament and was held from 15 March through 21 March 1982. Second-seeded Guillermo Vilas won the singles title.
The 1975 Dutch Open was a men's tennis tournament staged at 't Melkhuisje in Hilversum, Netherlands which was part of the Group B tier of the 1975 Grand Prix. The tournament was played on outdoor clay courts and was held from 20 July to 27 July 1975. It was the 19th edition of the tournament, and first-seeded Guillermo Vilas won his second consecutive singles title at the event.
The 1974 Dutch Open was a men's tennis tournament staged at 't Melkhuisje in Hilversum, Netherlands that was part of the Group C tier of the 1974 Commercial Union Assurance Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 21 July until 28 July 1974. It was the 18th edition of the tournament. First-seeded Guillermo Vilas won the singles title and earned $5,000 first-prize money. For the first time no women's events were held.
The 1977 Aryamehr Cup was a men's professional tennis tournament played on outdoor clay courts in Tehran in Iran. The event was part of the 1977 Colgate-Palmolive Grand Prix as a Five Star category event. It was the sixth and final edition of the tournament and was held from 3 October through 9 October 1977. Guillermo Vilas won the singles title.
The 1981 Torneo Godó or Trofeo Conde de Godó was a tennis tournament that took place on outdoor clay courts in Barcelona, Catalonia, Spain. It was the 29th edition of the tournament and was part of the 1981 Grand Prix circuit. It was held from October 5 through October 11, 1981. Ivan Lendl won the singles title.
The 1975 Washington Star International was a men's tennis tournament and was played on outdoor clay courts. It was categorized as an AA tournament and was part of the 1975 Grand Prix circuit. It was the seventh edition of the tournament and was held in Washington, D.C. from July 21 through July 28, 1975. Guillermo Vilas won the singles title and $16,000 prize money and a car in a final that was twice interrupted due to rain. Total attendance during the tournament was 55,000.
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.
The 1978 Swiss Indoors was a men's tennis tournament played on indoor hard courts at the St. Jakobshalle in Basel, Switzerland that was part of the 1978 Colgate-Palmolive Grand Prix. It was the 10th edition of the tournament and was held from 24 October through 29 October 1978. First-seeded Guillermo Vilas won the singles title.
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 1982 Cuore Cup was a men's tennis tournament played on indoor carpet courts at the Palazzo dello Sport in Milan, Italy. The event was part of the Super Series tier of the 1982 Volvo Grand Prix circuit. It was the fifth edition of the tournament and was held from 22 March through 28 March 1982. Second-seeded Guillermo Vilas won the singles title an earned $70,000 first prize money. He entered the tournament on a wildcard after John McEnroe, the winner of the three previous editions, withdrew due to an ankle injury.
The 1977 Nice International Championships, was a men's tennis tournament played on outdoor clay courts at the Nice Lawn Tennis Club in Nice, France, and was part of the 1977 Colgate-Palmolive Grand Prix. It was the sixth edition of the tournament and was held from 28 March until 3 April 1977. First-seeded Björn Borg won the title.
The 1982 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. The event was part of the Super Series of the 1982 Volvo Grand Prix circuit. It was the 55th edition of the tournament and was held from July 12 through July 18, 1982. First-seeded Guillermo Vilas won the singles title.
The 1980 Campionati Internazionali di Sicilia, also known as the Palermo Grand Prix or the Sicilian Open, was a men's tennis tournament played on outdoor clay courts in Palermo, Italy that was part of the 1980 Volvo Grand Prix. It was the second edition of the tournament and took place from 8 September until 14 September 1980. First-seeded Guillermo Vilas won the singles title.
Guillermo Vilas [1] 
Ismail El Shafei / 
Balázs Taróczy [2] 
