#4 John McEnroe
Stanford alumnus John McEnroe is a household name in tennis. The late 1970s and 1980s saw McEnroe assert himself as one of tennis' most prominent faces. Most people associate McEnroe with his Singles game and the terrific matches that he had with great rival Bjorn Borg. Few people, however, are aware of the fact that McEnroe is in fact one of the greatest Doubles players of all-time.
Known for his mercurial and maverick ways, McEnroe won a total of 78 Doubles titles and is the only player in the Open Era to have been ranked World Number 1 in Singles and Doubles categories.
McEnroe, one of the finest volleyers that the game has had, won 7 of his 9 Grand Slam Doubles titles with fellow American Peter Fleming. McEnroe's tally of 155 ATP titles (77 in Singles and 78 in Doubles) is the highest among Men in the Open Era.