Result grid
Group A
Novak Djokovic
Stanislas Wawrinka
Tomáš Berdych
Marin Čilić
Points
Novak DjokovicDjokovic
3
Stanislas WawrinkaWawrinka
2
Tomáš BerdychBerdych
1
Marin ČilićČilić
0
Group B
Roger Federer
Kei Nishikori
Andy Murray
Milos Raonic
Points
Roger FedererFederer
3
Kei NishikoriNishikori
1
Andy MurrayMurray
1
Milos RaonicRaonic
0