Wawrinka d. Marchenko

Wawrinka beat Marchenko 6-4, 6-1, 6-7(5), 6-3 in the fourth round at the U.S. Open - New York. Wawrinka won 143 of 255 points (56%). Wawrinka hit 8 aces to 5 and won 73% of points behind the first serve (60/82) against 65% for Marchenko. Wawrinka converted 7 of 15 break points and saved 7 of 10 faced; Marchenko converted 3 of 10. Marchenko double-faulted 8 times. Winners to unforced errors: 49–41 for Wawrinka, 34–52 for Marchenko. The match was played on hard in United States.