Juan Martin Del Potro -03- (ARG) def  Borna Coric -20- (CRO) | 64 63 61
Croatia’s Borna Coric played a hell of a first-set against the surgically enhanced and 2009 US Open Champion Juan Martin Del Potro. Had his right hamstring not given him trouble late in set-1, this one would have been far more competitive down the stretch.
It’s not easy to score break opportunities against the heavy-hitting Argentine. Borna got one peak, midway through the first, and he delivered. But Delpo’s wingspan was too wide for the World #20. Juan Martin had a beat on Coric’s serve throughout the match and finished with 5 breaks in 14 chances. Too many for any opponent to overcome, especially with a lame hamstring.
On Tuesday, Del Potro’s return game will truly be tested, as he faces John Isner for the 12th time. He’s won 7 of their previous matches, most recently in the Round of 16 at Roland Garros. In their first match this year, John earned a straight-sets victory in the Miami Semifinals.
NEXT:  Juan Martin Del Potro -03- (ARG) vs  John Isner -11- (USA)
R4: def  Borna Coric -20- (CRO) 64 63 61 | Arthur Ashe Stadium
R3: def  Fernando Verdasco -32- (ESP) 75 76(6) 63 | Arthur Ashe Stadium
R2: def Denis Kudla -72- (USA) 63 61 76(4) | Louis Armstrong Stadium
R1: def Donald Young -246- (USA) 60 63 64 | Louis Armstrong Stadium
 Juan Martin Del Potro -03- (ARG)
9-years-ago he captured his first Grand Slam title right here in Arthur Ashe Stadium, defeating Rafael Nadal in the Semi’s, then 5-time defending champion Roger Federer in a thrilling 5-set Final. He’s a Davis Cup Champion, an Olympic Bronze and Silver Medalist, and with victories this year at Indian Wells and Acapulco – now owns 22 ATP World Tour Singles titles. He’s reached 4 Finals this year alone – and comes into this year’s US Open with a career-high ranking of world #3. A Semifinalist here last year – From Argentina, please welcome 2009 US Open Champion…Juan Martin Del Potro.
 Borna Coric -20- (CRO)
At 21-years-old, he has reached the Round of 16 at a Grand Slam for the first time. Earlier this year, he defeated World #1 Roger Federer to capture the title in Halle, and climbed to a career-high ranking of #20 in the World. Last year, as a “lucky loser” at the Madrid Masters, he earned his first career win over a World #1, defeating Andy Murray to reach the Quarterfinals. He now owns 2 ATP World Tour Singles titles, was a Semifinalist at last year’s ATP NextGen Finals, and in 2016 – helped lift Croatia to it’s first Davis Cup Final since 2005. Competing in his 5th US Open, from Croatia – Please welcome…Borna Coric.