LONDON, ENGLAND - JULY 12:  (EDITORIAL USE ONLY - NO COMMERCIAL USEAGE)  Serena Williams of the United States and Novak Djokovic of Serbia dance on stage at the Champions Dinner at the Guild Hall on day thirteen of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on July 12, 2015 in London, England.  (Photo by Thomas Lovelock - AELTC Pool/Getty Images)