Picking up at 59-59 in the fifth set, the match continued on serve with no break points until the American hit a backhand passing shot past the Frenchman in the 138th game of the set to finish the contest in front of a packed crowd on Court 18.
The final score read: 6-4, 3-6, 6-7 (7), 7-6 (3) 70-68.
Isner finished with a total of 112 aces and Mahut 103.
The first-round match lasted 11 hours, 5 minutes, over three days. The fifth set alone lasted 8 hours, 11 minutes.
