https://kids.guinnessworldrecords.com en

Highest number of games played in a tennis match

Highest number of games played in a tennis match
Who
John Isner, Nicolas Mahut
Where
United Kingdom (Wimbledon, London,)
When
24 June 2010
The most games played in a tennis match is 183 by John Isner (USA) and Nicolas Mahut (France) in a first-round match at the 2010 Wimbledon Championships from 22-24 June 2010.