|Duration 15January – 9 May|
Most tournament finals Stan Smith (8)
Most tournament titles Stan Smith (7)
Points leader Stan Smith (75)
The 1973 World Championship Tennis circuit was one of the two rival professional male tennis circuits of 1973. It was organized by World Championship Tennis (WCT). In April 1972 WCT signed an agreement with the International Lawn Tennis Federation (ILTF) as a result of which the 1973 men's tennis season was divided in a WCT section, which ran from January until May, and a Grand Prix circuit which was held from May onward. The WCT circuit divided the players into two groups of 32 players, with each group playing 11 tournaments of the 22 tournaments. The four highest ranked players from each group qualified for the season finals in Dallas. The total available prize money was almost $1,250,000.