LONDON, ENGLAND - JUNE 28: A Wimbledon official points out the plague that is on the outside of Court 18 to commemorate the longest match which was between John Isner and Nicolas Mahut in 2010 on day six of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon on June 28, 2014 in London, England.  (Photo by Dan Kitwood/Getty Images)