Djokovic captured the men's award for the third straight year, and Williams took the honor for the fourth time.
Djokovic started the year by winning a third straight Australian Open and was runner-up at Wimbledon and the U.S. Open. The 26-year-old Serb finished the season No. 2 in the ATP rankings with seven tour titles.
The 32-year-old Williams won the French Open and U.S. Open in 2013 to end the year No. 1 in the WTA rankings for the first time since 2009.