Djokovic, Williams Named ITF World Champions

Novak Djokovic and Serena Williams have been named ITF World Champions for 2015, after both players won three Grand Slam titles this year.

Djokovic won the Australian Open, Wimbledon and the US Open, amassing a career-best total of 11 titles in 2015 and an 82-6 record.

Djokovic, who now has won the ITF World Champion title five times, said "my season was the best of my career."

Williams took the Australian Open, French Open and Wimbledon, holding all four Grand Slam titles before losing in the US Open semifinals. She ended the year with a 53-3 record.

Williams won the ITF title for the sixth time and said "it has been an amazing year."