The longest tennis match ever played was between John Isner of the United States and Nicolas Mahut of France at the 2010 Wimbledon Championships. This epic first-round match lasted a total of 11 hours and 5 minutes, spread over three days from June 22 to June 24, 2010

. Key details of the match include:

• The final score was 6–4, 3–6, 6–7(7–9), 7–6(7–3), 70–68 in favor of John Isner.
• The match featured an unprecedented 183 games in total, with the fifth set alone lasting over eight hours and consisting of 138 games.
• Both players served an extraordinary number of aces, with Isner hitting 113 and Mahut 103.
• The match was so long that the electronic scoreboard stopped working during the final set due to the unusually high game count

This marathon match is widely regarded as a test of endurance, willpower, and physical and mental resilience. It prompted changes in tennis rules regarding final set tiebreaks to prevent such extreme durations in the future

. In summary, the Isner–Mahut match at Wimbledon 2010 holds the record for the longest tennis match ever played, lasting 11 hours and 5 minutes over three days with a final score of 70–68 in the fifth set