Originally Posted by krosero
Seven rounds at RG would have been especially grueling for someone his age -- and Rosewall knew it. (We had a thread about this: http://tt.tennis-warehouse.com/showthread.php?t=302936
And we've only talked about 7 rounds at RG, picture also the claycourt preparations that Rosewall would have done, in practice and in tournaments, if he wanted to enter RG with the intention of winning it. It would have been draining for him.
krosero, even though I understand your argument, I would yet say that Rosewall (and Laver for that matter) would have had good chances to win the French Open in 1970, 1971 and 1972 (not in 1973 though!).
Remember that Muscles won the Cincinnati 1970 clay event with top participation and going over 6 rounds.
He also won the 1971 Washington Star clay tournament, winning all six matches including wins against Laver and Smith.
In the French Open players have one day rest after every round. That might compensate for one round more than the mentioned events and for best of five matches.