Novak Djokovic speaks out on his fitness and sends a message to Federer and Nadal

Novak Djokovic speaks out on his fitness and plans for future. Ex-number 1 has collected two Grand Slams this season and plans to win all 4 Grand Slams in 2019. “I had to change my game, especially my serve, as a result of the surgery. I didn't expect to come back so quickly,” he said (via Express). “I was in the unfamiliar situation of losing more matches than I was winning early on this season and when that happens, you begin to wonder whether you've made the right decisions.