Serena Williams: "Rafa Nadal is an animal"

It is an animal. Another definition does not exist for which it does, by its physical and mental force. I could not never do what he. He is exceptional, know all to it

that he can play so many parties as Nadal in the form in which does

Of course, you must be very young and to be in an optimal form, because they weigh much in the physicist. It is very difficult, I I could not do it