I was wondering what others felt was the absolute lowest temperature that they would play tennis outdoors. In my area late fall temps are sometimes in the 70s but more often in the 40s and 50s. There's a friend of mine that plays all winter long - he wears a heavy coat and gloves and says as long as there is no snow on the court he can play. I could not play with a heavy coat because it would really hinder my serve motion. And I would be afraid of injuring myself if my muscles were too cold and I pushed them too quickly.