Clinical Juan Martin del Potro books John Isner quarter-final date

Another match, another straight sets victory for Juan Martin del Potro on Arthur Ashe Stadium.
The 2009 US Open champion is yet to lose a fourth-round match on the main court at Flushing Meadows and he is yet to drop a set in this year’s tournament.
He made sure that streak stayed alive on Sunday as he saw off the challenge of Borna Coric, hitting 33 winners en route to a 6-4, 6-3, 6-1 win.
Heading in the right direction:@delpotrojuan powers past Coric 6-4, 6-3, 6-1 to set up a QF clash against Isner!#USOpen pic.twitter.com/ARQXmQ4iqI
— US Open Tennis (@usopen) September 3, 2018
Del Potro was in complete control and the only time the 20th seeded Coric had a bit of joy was when he broke back in game seven of the opening set. After that it was one-way traffic.
“I think to win in straight sets every match is important for the body, for the legs, for the physical condition. But in the end every match is a new battle, and you must be 100 per cent for that moment,” the Argentine said.
“It doesn’t matter if I win in three sets or five sets, in the next round it will be a new match.”
He will face John Isner for a place in the semi-final after the American beat Milos Raonic 3-6, 6-3, 6-4, 3-6 6-2 in three hours and nine minutes.
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