First-seeded Björn Borg successfully defended his title, defeating Víctor Pecci, Sr. 6–3, 6–1, 6–7(6–8), 6–4 in the final to win the Men's Singles tennis title at the 1979 French Open.
First-seeded and two-time defending champion Björn Borg successfully defended his tennis title at the 1980 French Open, defeating Vitas Gerulaitis 6–4, 6–1, 6–2 in the final to win his fifth French title after 1974, 1975, 1978 and 1979. Borg went through the entire tournament, which featured 17 of the top 20 players, without dropping a set; this would not be achieved by a man at a Grand Slam event again until Roger Federer at the 2007 Australian Open.
Eighth-seeded Brian Teacher defeated Kim Warwick 7–5, 7–6(7–4), 6–2 in the final to win the Men's Singles tennis title at the 1980 Australian Open.
The 1978 South American Championships was a men's Grand Prix tennis circuit tournament held in Buenos Aires, Argentina and played on outdoor clay courts. The event was held from 20 November through 26 November 1978. Fourth-seeded José Luis Clerc 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 1978 Fischer-Grand Prix was a men's tennis tournament played on indoor hard courts at the Wiener Stadthalle in Vienna, Austria that was part of the 1978 Colgate-Palmolive Grand Prix. It was the fourth edition of the tournament and was held form 23 October until 29 October 1978. Stan Smith won the singles title.
Tony Roche was the defending champion but did not compete that year.
The 1983 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 1983 Volvo Grand Prix circuit. It was the 11th edition of the tournament and was held from July 25 through July 31, 1983. José Luis Clerc won the singles title.
The 1981 Italian Open was a combined men's and women's tennis tournament that was played on outdoor clay courts. For the second time in the history of the tournament the men and women competed in different locations. The men's event was held at the traditional location of Foro Italico in Rome, while the women played in Perugia. It was the 38th edition of the tournament. The men's tournament was part of the 1981 Volvo Grand Prix while the women's tournament was part of the Toyota Series. The women's event was played from 4 May through 10 May 1981 while the men's event was organized from 18 May through 24 May 1981. Third-seeded José Luis Clerc won the men's singles title and the accompanying $24,000 first-prize money. The women's singles title was won by first-seeded Chris Evert-Lloyd, her fourth Italian Open title after 1974, 1975 and 1980.
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 1979 Milan Indoor, also known by its sponsored name Ramazzotti Cup, was a men's tennis tournament played on indoor carpet courts at the Palazzo dello Sport in Milan, Italy. The event was part WCT Tour which was incorporated into the 1979 Colgate-Palmolive Grand Prix circuit. It was the second edition of the tournament and was held from 26 March through 1 April 1979. Third-seeded John McEnroe won the singles title.
The 1978 Milan Indoor, also known by its sponsored name Ramazzotti Cup, was a men's tennis tournament played on indoor carpet courts at the Palazzo dello Sport in Milan in Italy. The event was part WCT Tour which was incorporated into the 1978 Colgate-Palmolive Grand Prix circuit. It was the inaugural edition of the tournament and was held from 27 March through 2 April 1978. Second-seeded Björn Borg won the singles title. Total attendance for the tournament was 76,841.
The 1981 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 1981 Volvo Grand Prix. It was the 13th edition of the tournament and was held from 12 October through 18 October 1981. First-seeded Ivan Lendl 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 1983 Sovran Bank Classic was a men's tennis tournament and was played on outdoor clay courts. The event was part of the 1983 Grand Prix circuit. It was the 15th edition of the tournament and was held at Rock Creek Park in Washington, D.C. from July 18 through July 24, 1983. First-seeded José Luis Clerc won the singles title, his second at the event after 1981.
The 1979 Nice International Open 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 1979 Colgate-Palmolive Grand Prix. It was the eighth edition of the tournament and was held from 2 April until 8 April 1979. Fifth-seeded Víctor Pecci won the title.
The 1982 Swiss Open was a men's tennis tournament played on outdoor clay courts in Gstaad, Switzerland that was part of the 1982 Volvo Grand Prix tennis circuit. It was the 36th edition of the tournament and was held from 5 July through 11 July 1982. Second-seeded José Luis Clerc won the singles title.
The 1977 Chilean International was a men's tennis tournament played on outdoor clay courts in Santiago, Chile. It was the second edition of the tournament and was held from 14 November through 20 November 1977. The tournament was part of the 1 Star tier of the Grand Prix tennis circuit. First-seeded Guillermo Vilas won the singles title.
The 1979 Santiago International Classic was a men's tennis tournament played on outdoor clay courts in Santiago, Chile that was part of the Grand Prix tennis circuit. It was the fourth edition of the tournament and was held from 26 November through 2 December 1979. Second-seeded Hans Gildemeister won the singles title.
The 1980 Santiago International Championships was a men's tennis tournament played on outdoor clay courts in Santiago, Chile that was part of the Grand Prix tennis circuit. It was the fifth edition of the tournament and was held from 24 November through 30 November 1980. Third-seeded Víctor Pecci won the singles title.
José Luis Clerc [1] 
Hans Gildemeister / 
Víctor Pecci [2]