Andre Agassi chooses the best among Nadal, Federer, and Djokovic: 'You just can't argue'

The American legend Andre Agassi made it clear who stands at the pinnacle of tennis.

• He beat Federer and faced Djokovic, but retired after playing his second Grand Slam: 'I felt like tennis hated me'
• From legends to eternity: The tennis records that seem impossible to break