Two-time defending champion Björn Borg successfully defended his title, defeating Vitas Gerulaitis in the final, 6–4, 6–1, 6–2 to win the men's singles tennis title at the 1980 French Open. It was his fifth French Open title, following wins in 1974, 1975, 1978, and 1979. Borg did not lose a set during the tournament.
The 1979 Paris Open was a Grand Prix tennis tournament played on indoor carpet courts. It was the 10th edition of the Paris Open. It took place at the Palais omnisports de Paris-Bercy in Paris, France from 29 October through 4 November 1979. First-seeded Harold Solomon won the singles title.
The 1979 Volvo International was a men's professional tennis tournament played on outdoor clay courts in North Conway, New Hampshire in the United States and was part of the 1979 Colgate-Palmolive Grand Prix. It was the 7th edition of the tournament and was held from July 30 through August 5, 1979. Fourth-seeded Harold Solomon won the singles title.
The 1979 Benson & Hedges Championships, also known as the Wembley Championships, was a men's tennis tournament played on indoor carpet courts at the Wembley Arena in London, England that was part of the 1979 Colgate-Palmolive Grand Prix. It was the fourth edition of the tournament and was held from 13 November until 17 November 1979. First-seeded John McEnroe won his second consecutive title at the event.
The 1979 Bordeaux Open also known as the Grand Prix Passing Shot was a men's tennis tournament played on outdoor clay courts at Villa Primrose in Bordeaux, France that was part of the 1979 Colgate-Palmolive Grand Prix. The tournament was held from 1 October until 7 October 1979. Singles matches were best of five sets and doubles best of three. Fourth-seeded Yannick Noah won the singles title.
The 1977 Western Championships, also known as the Cincinnati Open, was a men's tennis tournament played on outdoor clay courts at the Sunlite Swim and Tennis Club at Old Coney in Cincinnati, Ohio in the United States that was part of the 1977 Colgate-Palmolive Grand Prix. It was the 77th edition of the tournament and was held from August 11 through August 18, 1977. Third-seeded Harold Solomon won the singles title.
The 1978 South African Open was a men's tennis tournament played on outdoor hard courts in Johannesburg, South Africa that was part of the 1978 Colgate-Palmolive Grand Prix circuit. It was the 75th edition of the tournament and was held from 27 November through 4 December 1978. Second-seeded Tim Gullikson 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 1974 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 1974 Grand Prix circuit. It was the sixth edition of the tournament and was held at the Washington Tennis Stadium in Washington, D.C. from July 23 through July 29, 1974. Eleventh-seeded Harold Solomon won the singles title and earned $16,000 prize money in a final that was played over two days due to rain.
The 1976 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, USA. It was the seventh edition of the tournament and was held from 26 July through 2 August 1976. The tournament was part of the Grand Prix tennis circuit and categorized as Four Star. The singles final was won by Harold Solomon who received $20,000 first prize money.
The 1978 Alan King Tennis Classic was a men's tennis tournament played on outdoor hard courts at the Caesars Palace in Las Vegas, Nevada in the United States that was part of the 1978 Colgate-Palmolive Grand Prix. It was the seventh edition of the tournament was held from April 24 through April 30, 1978. Harold Solomon won the singles title after Barazzutti had to forfeit in the second set due to illness induced by food poisoning. Solomon earned $50,000 first-prize money as well as 225 Grand Prix points.
The 1978 Italian Open was a combined men's and women's tennis tournament that was played by men on outdoor clay courts at the Foro Italico in Rome, Italy. The men's tournament was part of the 1978 Colgate-Palmolive Grand Prix while the women's tournament was part of the Colgate International Series. It was the 35th edition of the tournament and was held from 22 May through 28 May 1978. The singles titles were won by first-seeded Björn Borg, who won his second Italian Open title after 1974, and third-seeded Regina Maršíková.
The 1978 U.S. Pro Tennis Championships was a men's tennis tournament played on outdoor green clay courts (Har-Tru) at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States. The event was part of the 1978 Grand Prix circuit. It was the 51st edition of the tournament and was held from August 21 through August 28, 1978. Despite pressure to switch to a hard court surface from the Association of Tennis Professionals (ATP) and some leading players, in line with the surface change made that year by the US Open which directly followed the Boston event, the tournament organization elected to remain a clay court tournament in 1978. Several top players including Björn Borg, Guillermo Vilas and Jimmy Connors elected not to play the tournament. Fourth-seeded and defending champion Manuel Orantes won the singles title and the accompanying $32,000 first-prize money. The final was delayed until Tuesday, August 29 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 1978 German Open was a combined men's and women's tennis tournament played on outdoor red clay courts. The men's tournament was part of the 1978 Colgate-Palmolive Grand Prix circuit, categorized as a four-star event, while the women's tournament was part of the Colgate Series and classified as an A category event. It was the 70th edition of the tournament and took place at the Am Rothenbaum in Hamburg, West Germany, from 15 May through 21 May 1978. Guillermo Vilas and Mima Jaušovec, both first-seeded, won the singles titles.
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 1979 Louisville Open, also known as the Louisville International 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 tenth and final edition of the tournament and was scheduled from Monday, July 23 through Sunday, July 29, 1979 but due to intermittent rain throughout the week it ended one day late. Some matches were played on indoor clay courts. The tournament was part of the Grand Prix tennis circuit. The singles final was won by seventh-seeded John Alexander, last year's runner-up, who received $25,000 first prize money and earned 175 ranking points.
The 1979 German Open was a men's tennis tournament played on outdoor clay courts at Am Rothenbaum in Hamburg, West Germany that was part of the Super Series of the 1979 Grand Prix circuit. It was the 71st edition of the event and took place from 14 May until 20 May 1979. Sixth-seeded José Higueras won the singles title.
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 Chilean 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 third edition of the tournament and was held from 27 November through 3 December 1978. Third-seeded José Luis Clerc won the singles title.
Harold Solomon [1] 
Víctor Pecci / 
Wojciech Fibak [2] 