I saw good chunks of this game, it was amazing:
John Isner won the longest tennis match in history by defeating Nicolas Mahut by 70-68 in a final set at Wimbledon. The competition lasted more than eleven hours spread over three days:
Picking up at 59-59 in the fifth set Thursday, the match continued on serve with no break points until the American hit a backhand passing shot to finish the contest in front of a packed crowd on Court 18.
You can watch the winning play at 20 seconds into the video.