Stanislas Wawrinka powers into third round over Korean teenager Chung Hyeon

ByReuters

Updated 03/09/2015 at 21:23 GMT

French Open champion Stan Wawrinka outslugged gutsy South Korean teenager Chung Hyeon 7-6(2) 7-6(4) 7-6(6) to reach the third round of the US Open.

Stan Wawrinka of Switzerland hits a return at the U.S. Open

Image credit: Reuters

Wawrinka belted 26 aces and hammered in 62 winners on another sweltering hot day at Flushing Meadows but the 19-year-old Chung held his own against the Swiss fifth seed, ripping 28 winners and winning 21 of 33 forays to the net.

Wawrinka, in his all or nothing, aggressive style, also registered 66 unforced errors against the bespectacled Korean, a 2013 Wimbledon junior finalist who is now ranked 69th.

"It was a really tough match, more than three hours," said Wawrinka. "I was playing good tennis. He's a great fighter and not easy to play."

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The 30-year-old Wawrinka, who also has the 2014 Australian Open crown to his credit, next faces Ruben Bemelmans of Belgium, who advanced when American Jack Sock retired due to cramping while leading 6-4 6-4 3-6 1-2.