McEnroe and "true" grand slam total
Even though, I am only 22, I recognize that up until about the late-1980s, the Australian Open and French Open were considered nowhere near the prestige of Wimbledon and the U.S. Open. Consequently, great players in the last 20 years who have been successful at the Australian Open (notably Wilander, Edberg, Agassi, and Lendl) and French Open (notably Wilander and Lendl) have had their grand slam totals inflated.
As talented and successful as John McEnroe was, it is suprising to many that he won "only" 7 grand slams, however, when one analyzes his championships
(3 wimbledons and 4 U.S. Opens) he is tied for 2nd place (with, of course, Connors and Federer) for most presigious grand slams in the Open Era.
Some tennis historians have suggested that up until the late-1980s, winning other non-grand slam tournaments (notably the now defunct Dallas WCT tournament played in Spring) was as difficult and impressive as winning a grand slam.
Consequently, for McEnroe, who won the Dallas WCT tournament 5 times (including final victories over Borg, Connors, and Lendl), his "true" grand slam total should actually be 12. What do you think?