21
Jun
It is very difficult to talk about the best tennis player in history, since there is no criterion to define him. Once Guillermo Villas he spoke about that topic and said "the one who has the most Grand Slams, will be the best". Juan Martín Del Potro spoke about his return to tennis: "I feel like an active athlete" Many sports fans rank above all Roger Federerothers surrender to Rafael Nadal or also in front of Novak Djokovicwho a few days ago conquered his 23rd grand slam and I remain in history. Roger Federer was asked that question, but in…