The 1970 South American Championships was a men's tennis tournament that was part of the 1970 Pepsi-Cola Grand Prix and held in Buenos Aires, Argentina. It was the third edition of the tournament and ran from 31 October through 8 November 1970. It was played on outdoor clay courts. Željko Franulović won the singles title.
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 1975 Bavarian Tennis Championships was a men's Grand Prix tennis circuit tournament held in Munich, West Germany. The tournament was played on outdoor clay courts and was held from 7 May though 11 May 1975. First-seeded Guillermo Vilas won the singles title.
The 1977 Romika Cup was a men's tennis tournament played on outdoor clay courts at the MTTC Iphitos in Munich, West Germany. It was part of the 1977 Grand Prix tennis circuit and categorized as a Two Star event. The tournament was held from 26 April through 1 May 1977. Željko Franulović 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 1980 Geneva Open was a men's tennis tournament played on outdoor clay courts that was part of the 1980 Volvo Grand Prix. It was played at Geneva in Switzerland and was held from 22 September until 28 September 1980. Third-seeded Balázs Taróczy won the singles title.
The 1987 Dutch Open was a Grand Prix men's tennis tournament staged at the Melkhuisje in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 27 July until 2 August 1987. It was the 30th edition of the tournament. First-seeded Miloslav Mečíř won the singles title.
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 17th 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 1978 Torneo Godó or Trofeo Conde de Godó was a men's tennis tournament that took place on outdoor clay courts at the Real Club de Tenis Barcelona in Barcelona, Catalonia in Spain. It was the 26th edition of the tournament and was part of the 1978 Grand Prix circuit. It was held from 9 October until 15 October 1978. Eighth-seeded Balázs Taróczy won the singles title.
The 1974 Aryamehr Cup was a men's professional tennis tournament played on outdoor clay courts at the Imperial Country Club in Tehran in Iran. The event was part of the 1974 Commercial Union Assurance Grand Prix as a Group AA category event. It was the third edition of the tournament was held from 21 October through 27 October 1974. Guillermo Vilas won the singles title and the trophy was presented by Shah Mohammad Reza Pahlavi.
The 1971 U.S. Clay Court Championships was a combined men's and women's tennis tournament that was part of the 1971 Grand Prix circuit and categorized as a Group B event. The event was held in Indianapolis, USA and played on outdoor clay courts. It was the 3rd edition of the tournament in the Open Era and was held in from August 16 through August 22, 1971. Željko Franulović and Billie Jean King won the singles titles.
The 1974 Suisse Open Gstaad was a men's tennis tournament played on outdoor clay courts in Gstaad, Switzerland. It was the 29th edition of the tournament and was held from 8 July through 14 July 1974. The tournament was part of the Grand Prix tennis circuit and categorized in Group B. Guillermo Vilas won the singles title and the accompanying $8,000 prize money.
The 1970 Monte Carlo Open was a combined men's and women's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France. The tournament was independent, i.e. not part of the 1970 Pepsi-Cola Grand Prix or 1970 World Championship Tennis circuit. It was the 64th edition of the event and was held from 13 April through 19 April 1970. Željko Franulović and Helga Niessen won the singles titles.
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 1975 Louisville Open, also known as the First National Tennis Classic, was a men's tennis tournament played on outdoor clay courts at the Louisville Tennis Center in Louisville, Kentucky in the United States. It was the sixth edition of the tournament and was held from July 28 through August 5, 1975. The tournament was part of the Grand Prix tennis circuit and categorized in Group AA. The singles final was delayed by one day due to rain and was won by defending champion Guillermo Vilas who received the $16,000 first prize money. The doubles final was not played due to rain and the prize money was shared.
The 1977 Washington Star International was a men's tennis tournament and was played on outdoor clay courts in Washington, D.C., USA. It was part of the 1977 Grand Prix circuit and categorized as a 4 star event. It was the 9th edition of the tournament and was held in Washington, D.C. from July 18 through July 25, 1977. First-seeded Guillermo Vilas won the singles title, his second after 1975, and earned the $20,000 first-prize money. The singles final was delayed for two hours due to rain.
The 1977 Louisville Open, also known as the Louisville International Tennis Classic, was a men's tennis tournament played on outdoor clay courts at the Louisville Tennis Center in Louisville, Kentucky, United States. It was the eighth edition of the tournament and was held from 25 July through August 1, 1977. The tournament was part of the Grand Prix tennis circuit and categorized as a Four Star event. The singles final was won by first-seeded Guillermo Vilas who received $20,000 first prize money. It was Vilas' third title win at the tournament after 1974 and 1975.
The 1979 Washington Star International was a men's tennis tournament and was played on outdoor clay courts. The event was part of the 1979 Grand Prix circuit. It was the 11th edition of the tournament and was held at Rock Creek Park in Washington, D.C. from July 16 through July 22, 1979. First-seeded Guillermo Vilas won the singles title, his third at the event after 1975 and 1977.
The 1975 Dutch Open – Singles was an event of the 1975 Dutch Open tennis tournament and was played on outdoor clay courts at 't Melkhuisje in Hilversum in the Netherlands from 20 July until 27 July 1975. The draw comprised 32 players. Guillermo Vilas was the defending Dutch Open champion and retained his singles title by defeating Željko Franulović in the final, 6–4, 6–7, 6–2, 6–3.
The 1975 Dutch Open – Doubles was an event of the 1975 Dutch Open tennis tournament and was played on outdoor clay courts at 't Melkhuisje in Hilversum in the Netherlands from 20 July until 27 July 1975. The draw conisted of 15 teams. Tito Vázquez and Guillermo Vilas were the defending Dutch Open doubles champions but did not compete together in this edition. Wojciech Fibak and Guillermo Vilas won the title by defeating Željko Franulović and John Lloyd in the final, 6–4, 6–3.
Guillermo Vilas [1] 
Wojciech Fibak / 
