WIMBLEDON, England — Juan Martin del Potro won the bronze medal in Olympic tennis Sunday, beating Novak Djokovic 7-5, 6-4 in a rain-delayed match at Wimbledon.

With his victory assured, Del Potro fell to the grass, covered his face with his hands and wept.

The Argentine has put in long hours on the grass courts at the All England Club. On Friday, he lost 3-6, 7-6 (5), 19-17 to Roger Federer in a semifinal that lasted 4 hours, 26 minutes. It was the longest three-set men’s match of the Open era.