Rafael Nadal Sets Up Quarterfinal
The 10-time champion next faces fifth-seeded Dominic Thiem, who won 6-7 (2), 6-2, 6-3 against Djokovic.
Although he says he is finally playing pain-free after two years of struggles with a persistent right elbow injury, he was often on the back foot against Thiem.
But his backhand let him down after that, with Thiem getting consecutive breaks and holding for the second set when his opponent patted a two-handed backhand into the net.