WASHINGTON - AUG 1: Tommy Haas (GER) defeats Leonardo Mayer (ARG, not pictured) at the Citi Open tennis tournament on August 1, 2012 in Washington.
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WASHINGTON - AUG 1: Tommy Haas (GER) defeats Leonardo Mayer (ARG, not pictured) at the Citi Open tennis tournament on August 1, 2012 in Washington.