Del Potro beats Monfils in Rotterdam

AP - Sports
Del Potro beats Monfils in Rotterdam
Juan Martin del Potro of Argentina watches images of the Hawk-Eye electronic line-calling system after Gael Monfils of France challenged a line call at the ABN AMRO world tennis tournament at Ahoy Arena in Rotterdam, Netherlands, Tuesday Feb. 12, 2013. Del Potro won in two sets, 6-3, 6-4. (AP Photo/Peter Dejong)
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