LONDON, ENGLAND - JULY 12:  (EDITORIAL USE ONLY - NO COMMERCIAL USEAGE)  (IMAGE IS A DIGITAL COMPOSITE OF TWO PHOTOGRAPHS) Serena Williams of the United States and Novak Djokovic of Serbia pose 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)