Stan ends Querrey's dream Stanislas Wawrinka overcame injury and a partisan New York crowd to reach the US Open quarter-finals with victory over Sam Querrey.
Fed cruises into quarters Roger Federer eased past Jurgen Melzer in straight sets to book a quarter-final clash with Robin Soderling at the US Open.
Djokovic sends Fish reeling Third seed Novak Djokovic set up a quarter-final clash with Gael Monfils after easily beating Mardy Fish 6-3 6-4 6-1.
Great Dane stuns Sharapova Caroline Wozniacki took a giant step towards her maiden grand slam title with a straight-sets victory over Maria Sharapova.
