USA TODAYRoger Federer survives 19-17 third set in Olympic semifinalsUSA TODAYWIMBLEDON, England – In the longest match in Olympic tennis history, four hours and 26 minutes, Switzerland's Roger Federer finally put away Juan Martin del Potro of Argentina 3-6, 7-6 (5), 19-17 on Friday to advance to the finals.Federer reaches Olympic gold medal matchFox NewsFederer Edges Del Potro in Olympic SemifinalsABC Newsall 1,068 news articles »