Originally Posted by TMF
I'm saying more physical exertion, the more suffering under the hot sun. Players get cramp/exhaustion more easier.
Interesting, so Laver and Roche playing in 105 degree temps in the shade for 90 games at the 1969 Australian wasn't as exhausting or tough on them. Oh yes, I forgot the tiebreak wasn't around so I think Laver and Roche played a 22-20 set or something like that.