Former champion Del Potro into US Open last 16

Flying high: Argentina's Juan Martin del Potro celebrates

Former champion Juan Martin del Potro reached the US Open last 16 for the sixth time on Friday with a 7-5, 7-6 (8/6), 6-3 win over Spanish left-hander Fernando Verdasco.

Argentine third seed Del Potro, the 2009 US Open winner, goes on to face Borna Coric, the 20th seed from Croatia.

Coric made the fourth round of a Slam for the first time with a 6-3, 7-5, 6-2 victory over Russia's Daniil Medvedev.