The longest recorded tennis match lasted 11 hours and 5 minutes - Apparently.
In 2010, John Isner of the USA and Nicolas Mahut of France engaged in a five-set match at Wimbledon that lasted an astonishing 11 hours and 5 minutes. The match was played on June 22-23, with Isner ultimately winning in a final score of 6-4, 3-6, 6-7, 7-6, 70-68. This marathon match holds the record for the longest match in tennis history, with over 1,000 games played.