Wawrinka wins first set against Querrey
Stanislas Wawrinka, the 25th seed, won the first set from 20th seed Sam Querrey, 7-6 in a fabulous start to what should be a great match.
Querrey, the last remaining U.S. player in the men's tournament, had opportunities to win the match in the tiebreaker, but couldn't convert.
The winner will play Mikhail Youzhny, the 12th seed, in the quarterfinals.
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