At the 1950 World Championship, Leach lost a hard-fought five-set match to Michel Haguenauer of France in the round of 16. The next year, he regained his singles title by beating Czechoslovakia's Ivan Andreadis in four sets: 16–21, 21–18, 21–18, 21–12. He also made the semi-finals of doubles with Carrington and mixed doubles with Diane Rowe in 1951.