LONDON, ENGLAND - JUNE 29:  Former champion Lleyton Hewitt of Australia acknowledges the crowd following his defeat to Jarkko Nieminen (R) of Finland in his last ever Gentlemen's Singles match during day one of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club on June 29, 2015 in London, England.  (Photo by Clive Brunskill/Getty Images)