 Flam reached his first Grand Slam final at the U.S. championships in 1950, beating Bill Talbert and Gardnar Mulloy before losing to Art Larsen.At Wimbledon 1951 Flam beat Frank Sedgman before losing to Dick Savitt in the semifinals.In 1952 Flam beat Mulloy and Vic Seixas before losing in the semis to Jaroslav Drobny.