The coach of the Serbian tennis player Novak Djokovic, Marian Vajda, spoke about the cooperation with his ward. “Novak would like to take all four Slams in a year. We also talk about Federer’s record. Of course, for this he needs to train a lot and stay healthy. This is the only chance. We did not expect such a success last season. At the beginning of the year he could not afford to win the match at a high level. I knew that he would become a champion again, but I didn’t expect it to happen so early, “Tennis World quotes Vajda.