In 1968 he achieved his first Grand Slam title at the Australian Open with his fellow countryman and team mate Allan Stone in doubles.

Crealy won the Men's Doubles at the 1974 French Open with Onny Parun over Stan Smith and Bob Lutz.

In 1974, he won another Grand Slam Title in doubles, combining with New Zealander Onny Parun in the French Open.

There is some confusion over the 1969 US Open Championship title, which is held by Crealy and Allan Stone conjointly with Ken Rosewall and Fred Stolle.

[citation needed] The era of Open Tennis commenced in 1968, and at that time Boston was the home of the US National Doubles championship.