I am having mascul. Cramps after playing hour of tennis match, I sweat. A lot please let me know the doing?

Dehydration? You could be getting dehydrated or starting the thatch in a state of mild dehydration. Be sure to hydrate very well drinking lots of water before and after your match. Even hydrating well the day before and after playing in this case is important. If this still persists after replacing with adequate water see a doctor for further evaluation.