I was wondering how these guys who make it to the finals in these national tournaments are able to play singles and doubles for the entire week? I am 50years old and stay in shape by running at the track twice a week, but I can't imagine playing at a competitive level for an entire week against the best players in the country. If they are playing both singles and doubles, these guys must play two matches a day. How do they do it at without their bodies breaking down during the week? I'm amazed at what they are able to do!