The Russian veteran defeated the American 6-3, 6-1.
Eighth-seeded Jarkko Nieminen of Finland beat German Tobias Kamke 6-3, 6-4.
Nieminen was runner-up in the event last year to Frenchman Gael Monfils.
The tournament's top seeds are Jo-Wilfried Tsonga of France and Tomas Berdych of the Czech Republic.
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