"I expect an improvement of my level of tennis and my level of competition," says world No. 5.
See what happens when trick-shot artist Stefan takes his skills to the streets of London.
Stephens will be looking for another coach in 2016.
World No. 2 shows sense of humor in acceptance speech.
Relive the rage transforming the Happy Slam to the Hostile Slam.
The force is with Federer as he soars for this smash against buddy Stan Wawrinka.
