Novak Djokovic of Serbia reacts during his Men’s Singles Final match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London

Novak Djokovic of Serbia reacts during his Men’s Singles Final match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London

Novak Djokovic of Serbia reacts during his Men’s Singles Final match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth