[Protoss]

Originally Posted by Chrissie-fan

31 is not that old. Besides, she's a young 31 year old because she has rarely played a full schedule. There are 26 year olds that have played more tennis than Serena. And since she started dominating again she's looked fitter than has been the case in many a year. The woman takes better care of her body than ever before.

I'd say 31 is old in tennis though.

Plus she's played 662 singles matches in her career. A lot of players start to decline after around 600 matches played.