As Novak Djokovic Wins 19th Grand Slam, What Are the 19 Reasons That Make Him the Greatest?
Widely regarded as the greatest returner in tennis history, Serbian legend Novak Djokovic holds the record for spending most weeks (325) as No. 1. As per Andre Agassi and Maria Sharapova's former coach Nick Bollettieri, Belgrade-born Djokovic is the "most complete player ever" and the "most perfect player of all time".