According to NYTimes.com, regardless of the outcome of the Isner vs. Mahut match (assuming that it ever actually ends), both players and the chair umpire will be recognized by the tournament organizers:
“Tony Adamson, the All England Club’s public address announcer, will introduce a club official to present the two players and the chair umpire Mohammed Lahyani [who lasted all 7 hours of the 5th set yesterday without a bathroom break!] with a trophy-style bowl to commemorate their roles in the longest recorded match in tennis history.”
