- Who
- Daniel Nestor and Mark Knowles, Simon Aspelin and Todd Perry
- What
- 6/9 hour(s):minute(s)
- Where
- Canada ()
- When
The longest Grand Slam doubles tennis match ever played is 6 hr 9 min for the Wimbledon quarterfinal match between Daniel Nestor (Canada) and Mark Knowles (Bahamas) and Simon Aspelin (Sweden) and Todd Perry (Australia) on 4-5 July 2006. Knowles and Nestor won the match 5-7, 6-3, 6-7, 6-3, 23-21.
