California:
The Swede and two-time French Open finalist lost for just the second time this season which has yielded 19 victories and an ATP Tour best three titles.
Kohlschreiber will play either Juan Martin del Potro of Argentina or 20th seeded Alexandr Dolgopolov in the fourth round.
Topics mentioned in this article
Tennis
US Open 2011
Philipp Kohlschreiber
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