2. Novak Djokovic (Serbia)

After returning from injuries, the 31-year-old Djokovic won two Grand Slams at the Australia Open and the US Open and his first Cincinnati Masters championship, completing a career golden masters by bagging all nine ATP 1000s Masters trophies. He finished the season as ATP world No. 1, becoming the first player to return to glory after finishing out of the top 10 in previous year.