The Masters Pro was a tournament open to men's tennis professionals.
The Ampol Masters at White City, Sydney was held in 1958.
The tournament was played in a round robin format instead of the usual knockout competition on each of the six occasions that it was played in Los Angeles, and a knockout format when played at Sydney in 1958.
At the 1964 and 1965 editions the round robin stage was followed by a semifinal and final round.
[1] The event was played on hard cement tennis court's at the L.A. Tennis Club, and on grass in 1958 at White City, Sydney.