WASHINGTON – AUGUST 07: Marin Cilic of Croatia returns a shot against David Nalbandian of Argentina during their semifinal match on day 6 of the Legg Mason Tennis Classic at the William H.G. FitzGerald Tennis Center on August 7, 2010 in Washington, DC. (Photo by Streeter Lecka/Getty Images) *** Local Caption *** Marin Cilic