Former World No. 3 picks greatest player of all time between Federer, Djokovic and Nadal

Novak Djokovic, Roger Federer and Rafael Nadal are considered to be the best tennis players ever. But who is the true GOAT? Well, former World No. 3 and ATP Finals winner reveals his choice.

• Former World No. 1 and seven-time Grand Slam champion chooses best tennis player of all time
• Novak Djokovic reveals details from his relationship with Nadal and Federer: ‘I didn't receive acceptance’