Guillermo Vilas is an Argentine former professional tennis player. Vilas was the world No. 1 of the Grand Prix seasons in 1974, 1975 and 1977. He won four major titles and the year-end championships, totalling 62 singles titles alongside 16 doubles titles during his career on the ATP tour. World Tennis, Agence France-Presse and Livre d'or du tennis 1977, among other rankings and publications, rated him as world No. 1 in 1977. In the computerized ATP rankings, he peaked at No. 2 in April 1975, a position he held for a total of 83 weeks, although some have argued that Vilas should have been ranked No. 1 for at least 10 weeks, particularly in 1977 when he won 2 majors. He was inducted into the International Tennis Hall of Fame in 1991, two years after his first retirement.
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 South American Open also known as the 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. First-seeded Guillermo Vilas 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 1977 American Airlines Tennis Games was a men's tennis tournament played on outdoor hard courts. It was the 4th edition of the Indian Wells Masters and was part of the 1977 Colgate-Palmolive Grand Prix. It was played at the Mission Hills Country Club in Rancho Mirage, California in the United States from February 21 through February 27, 1977. Brian Gottfried won the singles title.
The 1977 Colgate-Palmolive Grand Prix was a professional tennis circuit administered by the International Lawn Tennis Federation which served as a forerunner to the current Association of Tennis Professionals (ATP) World Tour and the Women's Tennis Association (WTA) Tour. The circuit consisted of the four modern Grand Slam tournaments and open tournaments recognised by the ILTF. The Colgate-Palmolive Masters is included in this calendar but did not count towards the Grand Prix ranking. Colgate-Palmolive was the new tour sponsor, taking over from Commercial Union. Guillermo Vilas won the Grand Prix circuit, having accumulated the most points (2,047), and received the largest share from the bonus pool ($300,000). The top eight points ranked singles players as well as the top four doubles teams qualified for the season-ending Masters tournament
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 1977 South African Open, also known by its sponsored name SAB Open, was a combined men's and women's tennis tournament played on outdoor hard courts in Johannesburg, South Africa. The men's tournament was part of the 1977 Colgate-Palmolive Grand Prix while the women's event was part of the 1977–1978 Colgate International Series. It was the 74th edition of the tournament and was held from 28 November through 6 December 1977. Guillermo Vilas and Linky Boshoff won the singles titles.
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 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 1977 New South Wales Open, also known by its sponsored name Marlboro New South Wales Open, was a combined men's and women's tennis tournament played on outdoor grass courts at the White City Stadium in Sydney, Australia. The men's was part of the 1977 Colgate-Palmolive Grand Prix circuit. It was the 85th edition of the event and was held from 12 December through 18 January 1977. The singles titles were won by Evonne Goolagong Cawley and Roscoe Tanner. Defending champion Tony Roche was unable to participate due to a stomach muscle injury.
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 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 1977 Austrian Open , also known as the 1977 Head Cup for sponsorship reasons, was a men's tennis tournament played on outdoor clay courts.
The 1977 Raquette d'Or was a men's tennis tournament staged in Aix-en-Provence, France that was part of the One star category of the 1977 Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 26 September until 2 October 1977. It was the inaugural edition of the tournament. Ilie Năstase won the singles title. In a five-set final against Guillermo Vilas he had won the first two sets when Vilas retired in protest of Năstase's use of a spaghetti strung racquet.
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 1977 Orient Cup was a men's tennis tournament played on outdoor clay courts in Bogotá, Colombia that was part of the one star category of the 1977 Colgate-Palmolive Grand Prix. It was the inaugural edition of the tournament and was held from 7 November through 13 November 1977. First-seeded Guillermo Vilas won the singles title.
The 1978 Mutual Benefit Life Open, also known as the South Orange Open, was a men's tennis tournament played on outdoor clay courts at the Orange Lawn Tennis Club in South Orange, New Jersey in the United States. The event was part of the 1978 Grand Prix circuit. It was the ninth edition of the tournament and was held from July 31 through August 6, 1978. First-seeded Guillermo Vilas won his second consecutive singles title at the event and earned $15,000 first-prize money.
The 1977 Wendy's Tennis Classic, also known as the Buckeye Championships, was a men's tennis tournament played on outdoor clay courts at the Muirfield Village in Dublin, a suburb of Columbus, Ohio in the United States that was part of the Four Star category of the 1977 Grand Prix circuit. It was the eighth edition of the tournament and was held from August 8 through August 15, 1977. First-seeded Guillermo Vilas won the singles title and earned $20,000 first-prize money.
Guillermo Vilas [1] 
Colin Dibley / 
Wojciech Fibak [2] 
