"Big" Bill Tilden, the greatest player of the 1920s, and by far the most famous, turned professional at the end of 1930 and organized a tour with several lesser players and with himself to play the headline match against Koželuh. Their first encounter was on 18 February 1931 before 14,000 spectators in Madison Square Garden in New York. Tilden won 3 straight sets in only 65 minutes, attacking from both the baseline and the net and overwhelming Koželuh with his power. Tilden won the next 8 matches as well, all of them played indoors on a canvas surface that seldom had enough room for Koželuh to play his normal game far behind the baseline. Koželuh finally won their 10th match on an outdoor concrete court at the Los Angeles Tennis Club. In the course of the year, both in the United States and in Europe, the Czech eventually beat Tilden 17 times while losing 50 matches to him. Koželuh had firmly established himself as one of the half-dozen best players in the world.