I dont know much about this subject but Im curious. I think Sampras used a pretty heavy racket. I read Venus Williams uses a heavy racket. Concerning light rackets, Radwanska I think uses a Pure Drive Light or Team and Zheng Yi (or Yi Zheng) uses a RDIS 300, both very light. In men, I havent checked. Also, its hard to know because pros tend to customize (add lead, etc.). Any information about this subject?