Roger Federer of Switzerland challenges the call of one of the linesmen in his quarter final match against Finland's Jarkko Nieminen at the ABN AMRO tournament at the Ahoy Arena in Rotterdam, ... more 
Roger Federer of Switzerland challenges the call of one of the linesmen in his quarter final match against Finland's Jarkko Nieminen at the ABN AMRO tournament at the Ahoy Arena in Rotterdam, Netherlands, Friday, Feb. 17, 2012. Federer won in two sets 7-5, 7-6. (AP Photo/Peter Dejong) less 
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Associated Press | Photo By Peter Dejong
Fri, Feb 17, 2012 3:49 PM EST