Djokovic has not been able to win any Grand Slam except the Australian Open and has had successive defeats and is definately under pressure to sail through to the finals. He last lost to Federer in ATP Cincinnati recently.
Wawrinka has lost thrice in his last ten matches at Gstaad, Lonodn, and Cincinnati.
Both players have long list of duels since they first met in Aachen in 2004 and in their 14 encounters, the Serbian has a winning edge of 12-2 over the Swiss. This definately makes him favourite for this evening's match.
The match is scheduled for Tuesday, 4 September 2012 at 18:00 GMT at Arthur Ashe Stadium in New York.
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