Janko Tipsarevic ousted in tuneup
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The American took the opening set after Dodig double-faulted to give Querrey a 6-5 lead. In the second set, a netted forehand at 4-3 earned Dodig the only break. In the final set, a forehand error at 3-2 left Querrey in charge.
"Tough match," Querrey said. "We both served very well so it was just a matter of a couple of points here and there. I'm proud of myself after losing the second set to come back strong in the third."
Querrey will face sixth-seeded Marin Cilic of Croatia, who advanced 6-4, 2-0 when Yen-hsun Lu of Taiwan retired due to groin pain.
Lu had earlier upset third-seeded Janko Tipsarevic 6-3, 2-6, 7-6 (5) in a third-round match that was suspended overnight because of rain.
David Nalbandian twice rallied to reach the semifinals, first overcoming Edouard Roger-Vasselin of France 4-6, 7-5, 6-3 in a third-round match postponed on Thursday, and then beating Xavier Malisse of Belgium 4-6, 7-6 (2), 6-4.
Jo-Wilfried Tsonga's participation at Wimbledon remains in doubt after his injured finger was examined at a clinic in Geneva.
The Frenchman injured the little finger of his right racket hand when he fell during the final set of his third-round defeat to Dodig on Thursday.
Although there is no break as Tsonga feared, the finger is severely strained. He will have another exam on Monday.
Copyright 2012 by The Associated Press
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