US Open Men's Results - Day 8
Men's Singles Fourth Round
1-Rafael Nadal (Spain) def. Sam Querrey (USA) 6-2 5-7 7-6 (7-2) 6-3
6-Andy Murray (Great Britain) def. 10-Stanislas Wawrinka (Switzerland) 6-1 6-3 6-3
17-Juan Martin Del Potro (Argentina) def. Kei Nishikori (Japan) 6-3 6-4 6-3
Mardy Fish (USA) def. 32-Gael Monfils (France)) 7-5 6-2 6-2