
Marco Cecchinato pulled off a huge upset by beating Novak Djokovic in four sets.

Djokovic received a medical timeout after the first set and lost the second in a tiebreak.

After saving three match points, he couldn't save a fourth and exited to the 72nd-ranked Italian.

Cecchinato next faces the man with the most clay wins this season, Dominic Thiem.

Thiem beat second-seed Alexander Zverev, who was playing in a maiden grand slam quarterfinal like Cecchinato.

Zverev also received a medical timeout for a left leg injury. He struggled with his movement and lost in under two hours.

In the women's draw, Madison Keys still hasn't lost a set. She beat 2016 quarterfinalist Yulia Putintseva.


Keys plays fellow American and friend Sloane Stephens, who beat Daria Kasatkina -- another first-time slam quarterfinalist -- in two sets.

Stephens and Keys faced off in the US Open final in September, with Stephens prevailing in straight sets.