Roger Federer from Switzerland returns the ball to Igor Sijsling from the Netherlands during a demonstration match at the ABN Amro tennis tournament at AHOY stadium in Rotterdam, Netherlands, ... more 
Roger Federer from Switzerland returns the ball to Igor Sijsling from the Netherlands during a demonstration match at the ABN Amro tennis tournament at AHOY stadium in Rotterdam, Netherlands, Thursday, Feb. 16, 2012. (AP Photo/Ermindo Armino) less 
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Associated Press | Photo By Ermindo Armino
Thu, Feb 16, 2012 2:14 PM EST