The 1975 Commercial Union Assurance Grand Prix was a professional tennis circuit administered by the International Lawn Tennis Federation (ILTF) 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 Commercial Union Assurance Masters, Davis Cup Final and Nations Cup are included in this calendar but did not count towards the Grand Prix.
Jimmy Connors finished the year as ATP world No. 1 for the second time in his career. Connors won two tournaments during the season, and was runner-up at three majors at the Australian Open, the Wimbledon Championships and the US Open (though the Australian Open was a Group B event rather than a Triple Crown event like the other majors).
Guillermo Vilas was the 1975 Grand Prix No. 1. Vilas won five tournaments during the season, and was runner-up at a major at the French Open.
Arthur Ashe was named the ATP Player of the Year. Ashe won three tournaments during the season, including a major at the Wimbledon Championships.
1975 World Championship Tennis circuit
The 1975 World Championship Tennis circuit was one of the two rival professional male tennis circuits of 1975. It was organized by World Championship Tennis (WCT). The 1975 circuit divided the players in three groups, Red, Blue and Green who played 24 tournaments in 12 countries. The first tournament, U.S. Professional Indoor Championships, was a combined event as was the season's final which was played in Dallas by the eight best performers and was won by American Arthur Ashe who defeated Björn Borg from Sweden in four sets.
Ashe left with President Regan in July 1982
