Originally Posted by urban
Just a few examples of players collapsing: Vines 1933 in Davis Cup vs. Perry, Buchholz cramping and collapsing vs. Fraser on matchpoint for himself, Wim 1960. At the AO the players had to play in the brutal heat on midday, there was no roof and mostly there were no evening matches.
There also was no sitting down between games. Shoes were terrible compared to today causing blisters so the players would have problems walking if they played too much. I believe Laver and Gonzalez played the final of the US Pro in 1964 in conditions that has been described as monsoon like.