Former world number one Novak Djokovic has been named as the International Tennis Federation's world champion for 2013.
The Serbian has been given the honour, despite relinquishing his top ranking to Rafael Nadal, who managed to move back to the top after recovering from a knee injury.
A statement on the ITF's official website said: "Novak Djokovic narrowly edges out Rafael Nadal to become Men's World Champion thanks to his consistency at the Grand Slam tournaments and year-end performances."
Serena Williams has been handed the women's award.
