Jamie Murray of Great Britain and John Peers of Australia. Getty Images
Novak Djokovic of Serbia plays a forehand against Kei Nishikori of Japan during Day 1 of the ATP World Tour Finals at O2 Arena in London. Getty Images
Kei Nishikori of Japan against Novak Djokovic of Serbia during Day 1 of the ATP World Tour Finals at O2 Arena in London. Getty Images
Serbia’s Novak Djokovic celebrates after winning the first set . Reuters
Novak Djokovic of Serbia receives the ATP World Number 1 Award. Getty Images
Simone Bolelli and Fabio Fognini of Italy in action in their men’s doubles match against Jamie Murray of Great Britain and John Peers of Australia. Getty Images
Jamie Murray of Great Britain and John Peers of Australia. Getty Images
Novak Djokovic of Serbia plays a forehand against Kei Nishikori of Japan during Day 1 of the ATP World Tour Finals at O2 Arena in London. Getty Images
Kei Nishikori of Japan against Novak Djokovic of Serbia during Day 1 of the ATP World Tour Finals at O2 Arena in London. Getty Images
Serbia’s Novak Djokovic celebrates after winning the first set . Reuters
Novak Djokovic of Serbia receives the ATP World Number 1 Award. Getty Images
Simone Bolelli and Fabio Fognini of Italy in action in their men’s doubles match against Jamie Murray of Great Britain and John Peers of Australia. Getty Images
Jamie Murray of Great Britain and John Peers of Australia. Getty Images