But when it was over, Isner didn't gloat or overrreact. He smiled, he clapped for Mahut, he congratulated him. And then Mahut was just as gracious.
Plus, the All-England Tennis Club celebrated them both (and the chair umpire, who sat through all 11 hours) with commemorative awards.
When asked if he thought the rules should be changed so this wouldn't happen again, Isner (with some understatement) said that he didn't see how it could happen again.
In case you didn't see it, here is the final game and the winning shot:
Isner and Mahut are terrific role models for all kids who play any sport.