Tommy Haas, of Germany, returns the ball to Michael Russell, of the United States, during a match in the Citi Open tennis tournament, Tuesday, July 31, 2012, in Washington. (AP Photo/Nick Wass)

Photo by: Nick Wass

Tommy Haas, of Germany, returns the ball to Michael Russell, of the United States, during a match in the Citi Open tennis tournament, Tuesday, July 31, 2012, in Washington. (AP Photo/Nick Wass)