Rafael Nadal has advanced to the quarterfinals of the US Open with a 6-3, 3-6, 6-1, 6-2 win over Croatian Marin Cilic.
The second-seeded Spaniard will next face Argentine Diego Schwartzman, who beat Germany’s Alexander Zverev 3-6, 6-2, 6-4, 6-3.
Elsewhere, Frenchman Gael Monfils eased into the next round, beating Pablo Andujar 6-1, 6-2, 6-2.
Meanwhile, defending women's champion Naomi Osaka has crashed out after losing 7-5, 6-4 to Switzerland's Belinda Bencic.
It means Osaka loses her world number one ranking, with Ashleigh Barty returning to the top spot.

Dimitrov marks return from pectoral injury with win in Paris
Real Madrid captain Carvajal faces knee surgery setback
Simeone and Baena strike as Atletico beat Betis to extend unbeaten run
Juventus sack coach Tudor after eight-match winless run
India's Iyer taken to hospital after fielding injury
