LONDON, ENGLAND - JULY 01: Roger Federer of Switzerland practices with coach Ivan Ljubicic before the start of the Championships at the All England Tennis and Croquet Club in Wimbledon on July 1, 2018 in London, England. (Photo by TPN/Getty Images)
LONDON, ENGLAND - JULY 01: Roger Federer of Switzerland practices with coach Ivan Ljubicic before the start of the Championships at the All England Tennis and Croquet Club in Wimbledon on July 1, 2018 in London, England. (Photo by TPN/Getty Images)