Argentina's Juan Martin del Potro returns the ball to Marinko Matosevic of Australia during their quarter final match at the Erste Bank Open tennis tournament in Vienna, Austria, Friday

 

              Argentina
Argentina's Juan Martin del Potro returns the ball to Marinko Matosevic of Australia during their quarter final match at the Erste Bank Open tennis tournament in Vienna, Austria, Friday, Oct. 19, 2012. (AP Photo/Ronald Zak)
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