Ion Tiriac may not be a household name in the world of tennis, but the Romanian has become one of the sport's wealthiest figures.

MADRID -- Novak Djokovic, winner of a record 24 Grand Slam titles, says he can feel the changes taking place in tennis. People have started to accept, he says, that there is no more Roger Federer, no more Rafael Nadal and — soon — no more Djokovic.

Let's take a look at players with superior H2H records against Novak Djokovic. 11 players, past and present, have a winning record against Serbian.