Novak Djokovic was tennis’s immovable force–the man who turned Grand Slam draws into personal playgrounds and silenced stadiums with every improbable comeback.

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

Novak Djokovic has had a lengthy career of dominance. He's won every significant title and has the most Grand Slams of all time. But nothing lasts forever. The Serbian suffered a 6-3, 6-4 loss to Matteo Arnaldi at the Madrid Open on Saturday.