He is best known for losing the longest professional tennis match in history against American John Isner at Wimbledon in 2010 Frenchman Nicolas Mahut delivered an emotional farewell to professional tennis after his doubles defeat at the Paris Masters.Mahut, 43, won five Grand Slam doubles titles in a career spanning 25 years, but he is best known for losing the longest professional tennis match in history against American John Isner at Wimbledon in 2010.The match lasted 11 ho