Novak Djokovic and Serena Williams are the International Tennis Federation’s world champions for 2013. 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 United States Open. Williams won the French Open and United States Open to end the year No. 1 in the WTA rankings for the first time since 2009.

The American twins Bob and Mike Bryan were named men’s doubles world champions for the 10th time in 11 years, while Sara Errani and Roberta Vinci of Italy took the women’s doubles award.