Juan Martin del Potro defeated top-ranked Novak Djokovic 4-6, 6-4, 6-4 in the semifinals of the BNP Paribas Open on Saturday, handing the Serb his first loss in 21 matches dating to last October. Del Potro snapped his own four-match skid against Djokovic, who had beaten the Argentine in eight of 10 career meetings. Del Potro's 133-mph ace closed out the nearly 3-hour match in 96-degree heat. Del Potro raised both arms in celebration.
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