World Championship Tennis (WCT) was a tour for professional male tennis players established in 1968 and lasted until the emergence of the ATP Tour in 1990. A number of tennis tournaments around the world were affiliated with WCT and players were ranked in a special WCT ranking according to their results in those tournaments.
Stan Smith defeated Jan Kodeš in the final, 3–6, 6–3, 6–2, 7–6(5–3) to win the men's singles tennis title at the 1971 US Open.
The 1972 Swedish Pro Tennis Championships was a men's tennis tournament played on indoor carpet courts. It was the 1st edition of Swedish Pro Tennis Championships, and was part of the 1972 World Championship Tennis circuit. It took place at the Scandinavium in Gothenburg, Sweden, from 30 October until 5 November 1972.
The 1970 Paris Open Indoor Championships was a men's Grand Prix tennis tournament played on indoor carpet courts. It was the 2nd edition of the Paris Open. It took place at the Palais omnisports de Paris-Bercy in Paris, France, and ran from 9 November through 15 November 1970.
The 1971 Pepsi Cola Grand Prix was a professional tennis circuit held that year. It incorporated three of the four grand slam tournaments, the Grand Prix tournaments. It was the second edition of the Grand Prix circuit and was run by the International Lawn Tennis Federation (ITLF). In addition to regular tournament prize money a bonus prize money pool of £60,000 ($150,000) was available to be divided among the 20 highest ranking players after the last tournament. To be eligible for a share of the bonus pool a player had to compete in a minimum of nine tournaments. The circuit culminated in a Masters event in Paris, France for the seven highest point scoring players. Stan Smith was the winner of the circuit with 187 ranking points and four tournament victories.
The 1971 U.S. Pro Tennis Championships was a men's tennis tournament played on outdoor hard courts at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States and was part of the 1971 World Championship Tennis circuit. It was the 44th edition of the tournament and was held from August 2 through August 8, 1971. Sixth-seeded Ken Rosewall won the singles title, his third U.S. Pro title, and the accompanying $10,000 first-prize money. The final was watched by 5,500 spectators.
The 1972 Washington Star International was a men's tennis tournament that was played on outdoor clay courts at the Washington Tennis Stadium in Washington, D.C. The event was part of the 1972 World Championship Tennis circuit. It was the fourth edition of the tournament and was held from July 17 through July 23, 1972. Tony Roche won the singles title after surviving a match point in the final against Marty Riessen.
The 1972 Charlotte Tennis Classic, also known by its sponsored name North Carolina National Bank Tennis Classic, was a men's tennis tournament played on outdoor clay courts that was part of the World Championship Tennis (WCT) circuit. It was the second edition of the tournament and was held from April 18 through April 23, 1972 at the Julian J. Clark Tennis Stadium, owned by the Olde Providence Racquet Club in Charlotte, North Carolina in the United States. Second-seeded Ken Rosewall won the singles title.
The 1973 Charlotte Tennis Classic, also known by its sponsored name North Carolina National Bank Tennis Classic, was a men's tennis tournament played on outdoor clay courts that was part of group B of the World Championship Tennis (WCT) circuit. It was the third edition of the tournament and was held from April 17 through April 22, 1973 at the Julian J. Clark Tennis Stadium on the grounds of the Olde Providence Racquet Club in Charlotte, North Carolina in the United States. First-seeded Ken Rosewall won his second successive singles title at the event and earned $10,000 first-prize money.
The 1977 Colgate Tennis Patrons Classic, also known as the Hong Kong Open, was a men's tennis tournament played on outdoor hard courts in Hong Kong. It was the fifth edition of the event and was held from 7 November through 13 November 1977. The tournament was part of the Two Star tier of the 1977 Grand Prix tennis circuit. Unseeded Ken Rosewall won his second consecutive singles title at the event.
The 1970 Atlanta Tennis Classic, also known as the Atlanta WCT, was a men's tennis tournament played on outdoor hard courts at the DeKalb Tennis Center in Atlanta, Georgia in the United States that was part of the 1970 World Championship Tennis season. It was the inaugural edition of the tournament and was held from May 6 through May 10, 1970. Tom Okker, who survived a match point in his semifinals match against John Newcombe, won the singles title and the accompanying $5,000 first-prize money.
The 1972 Fidelity WCT Tournament, also known as the Richmond WCT, was a men's professional tennis tournament that was part of the Group A of the 1972 World Championship Tennis circuit. It was held on indoor carpet courts at the Richmond Coliseum in Richmond, Virginia in the United States. It was the seventh edition of the tournament and was held from February 2 through February 6, 1972. First-seeded Rod Laver won the singles title and earned $10,000 first-prize money.
The 1973 Copenhagen WCT, also known as the Copenhagen Professional Championships, was a men's tennis tournament played on indoor carpet courts in Copenhagen, Denmark. The tournament was part of Group B of the 1973 World Championship Tennis circuit. It was the inaugural edition of the event and was held from 11 February until 17 February 1973. Unseeded Roger Taylor won the singles title.
The 1971 Rothmans International Vancouver, also known as the Vancouver WCT, was a men's professional tennis tournament that was part of the 1971 World Championship Tennis circuit. It was held on indoor carpet courts at the PNE Agrodome in Vancouver, British Columbia in Canada. It was the second edition of the tournament and was held from 3 October through 11 October 1971. Fourth-seeded Ken Rosewall won the singles title and earned $10,000 first-prize money.
The 1973 Union Trust Classic, also known as the Washington Indoor, was a men's tennis tournament played on indoor carpet courts in Merrifield, Virginia in the United States that was part of Group B of the 1973 World Championship Tennis circuit. It was the second edition of the tournament and was held from March 19 through March 25, 1973. Unseeded Tom Okker won the singles title and earned $10,000 first-prize money after his opponent in the final, Arthur Ashe, failed to convert two matchpoints in the final set.
The 1973 Cleveland Tennis Classic, also known as the Cleveland WCT, was a men's tennis tournament held on indoor carpet courts in Cleveland, Ohio in the United States that was part of the Group B circuit of the World Championship Tennis. It was the second edition of the tournament and was held between the April 9 and April 15, 1973. Fifth-seeded Ken Rosewall won the singles title and earned $10,000 first-prize money as well as 10 WCT ranking points.
The 1971 Washington Star International – Singles was an event of the 1971 Washington Star International tennis tournament and was played in Washington, D.C., United States from July 12 through July 18, 1971. Cliff Richey was the defending champion but lost in the second round. Ken Rosewall won the singles title, defeating Marty Riessen in the final, 6–2, 7–5, 6–1.
The 1971 Rothmans International Quebec, also known as the Quebec International Open or Quebec WCT, was a men's professional tennis tournament that was part of the 1971 World Championship Tennis circuit. It was held on indoor carpet courts at Laval University in Quebec City, Quebec in Canada. It was the inaugural edition of the tournament and was held from 26 July through 1 August 1971. Tom Okker won the singles title and earned $10,000 first-prize money.
The 1972 Rothmans International Quebec, also known as the Quebec International Open or Quebec WCT, was a men's professional tennis tournament that was part of the 1972 World Championship Tennis circuit. It was held on indoor carpet courts at the Laval University sports centre in Quebec City, Quebec in Canada. It was the second edition of the tournament and was held from 9 April through 16 April 1972. Seventh-seeded Marty Riessen won the singles title and earned $10,000 first-prize money.
The 1971 Washington Star International – Doubles was an event of the 1971 Washington Star International tennis tournament and was played in Washington, D.C., United States from July 12 through July 18, 1971. Bob Hewitt and Frew McMillan were the defending doubles champions but did not compete together in this edition. Tom Okker and Marty Riessen won the doubles title, defeating Bob Carmichael and Ray Ruffels in the final, 7–6, 6–2.
Ken Rosewall [1] 
Tom Okker / 
Marty Riessen [2]