Three-time Grand Slam champion chooses the greatest player between Federer, Djokovic and Nadal

Novak Djokovic, Rafael Nadal, and Roger Federer are arguably the best male players of the past 20 years. A three-time Grand Slam champion reveals his preference when discussing the GOAT.

• Five-time Grand Slam champion Maria Sharapova picks greatest player of all time
• Former World No.1 and six-time Grand Slam champion, involved in first fatal accident in tennis history