He may have won 17 Grand Slams but current world number 1 Novak Djokovic isn't done yet. The Serbian tennis ace is confident that he will end up with more Grand Slam titles than Rafael Nadal and Roger Federer. Djoko also feels that he will have spent more time as World number 1 than his two rivals when the Serbian ends his career. With 17 slams, Djoko is 2 behind Rafael Nadal's tally of 19 & 3 behind the Swiss Ace Roger Federer. Tennis across the world is currently suspended due to the global pandemic.