Former champ del Potro eases into US Open quarterfinals

Juan Martín del Potro was relatively untroubled in his victory over Borna Ćorić. (AFP pic)

NEW YORK: Former champion Juan Martín del Potro cruised into the quarterfinals of the US Open on Sunday with a 6-4, 6-3, 6-1 victory over Croatia’s Borna Ćorić.

The third-seeded Argentine, who lifted the trophy in Flushing Meadows in 2009, is in the quarter-finals for a third straight year and sixth time overall, reaching the last eight without dropping a set.

Del Potro broke Ćorić in the final game of the opening set, and from there he was in control in a match again played to the accompaniment of cheers and chants from a group of del Potro’s friends who made the trip from Tandil to watch him.

Ćorić, the 21-year-old 20th seed, sought treatment for a right thigh problem late in the second set and never threatened in the third.

Del Potro wrapped it up after two hours and five minutes with his sixth service break of the match when Ćorić smacked a forehand into the net.

“After winning the first set, I started to play much better,” said del Potro. “I saw Borna with some problem for movement toward the end of the match and I focused on my game.”

I played even better than the last match,” added del Potro, who has spent an average of just two hours and 11 minutes per match on court.

Del Potro will take on American John Isner for a semifinal berth.

Isner, seeded 11th, defeated Canadian Milos Raonic in a battle of big-servers 3-6, 6-3, 6-4, 3-6, 6-2.

Del Potro has won seven of 11 prior matches with Isner, including a straight-sets victory in the fourth round of the French Open this year.