Novak Djokovic has used his return of serve skills to keep the pressure on his opponents throughout the 2015 season. He’s only lost three matches this year and in those matches he wasn’t able to exert the same return pressure as his other matches. Against Ivo Karlovic in Doha and Roger Federer in Dubai on hard courts, and Stan Wawrinka on the red clay of Roland Garros, Djokovic struggled on return. He managed just two breaks of serve in those three matches (48 return games played).
Check SI.com's Wimbledon 2015 data hub page throughout the whole tournament for the latest data-driven infographics and charts from IBM, the official technology partner for Wimbledon. IBM captures and analyzes the data that powers all of the Grand Slams, as well as the digital platforms that extend the experience to fans around the world.