The Tournament of Champions was a prominent professional tennis tournament series between 1957 and 1959. The tournament was held on the grass-courts of Forest Hills, New York, between 1957 and 1959, and an Australian version of the Tournament of Champions was held on grass at White City, Sydney in 1957 and 1959, and at Kooyong Stadium in Melbourne in 1958. The 1957 and 1958 Forest Hills tournaments had a round robin format, while the 1959 Forest Hills was an elimination tournament with 10 players. The Sydney version was an elimination event, while the 1958 Kooyong event was a round robin format.