Most games played in a professional tennis set

Most games played in a professional tennis set
Who
John Isner, Nicolas Mahut
What
138 total number
Where
United Kingdom (Wimbledon, London)
When
The most games played in a single set in the history of professional tennis is 138 in the fifth set of the first round Wimbledon Championships match between Nicolas Mahut (France) and John Isner (USA) in Wimbledon, London, UK, from 23-24 June 2010.