I've always thought a lot of the talent in the Williams sisters lies in their ability to control such power rackets. I mean, is there anyone else on the tour that can play with such rackets... especially Serana's? These Wilsons are loaded with power and are the type of rackets used by older recreational players with slow swings. And the sisters use it the way it's not meant to be used, with big swings. Swinging such a racket so fast and being able to control its power is quite a talent. Also the reason that the Williams sisters are loaded with power shots is because of the rackets too.