Britain's Andy Murray kept his ATP World Tour Finals hopes alive with a straight-sets win over Milos Raonic at the O2 Arena.
Murray would have been been eliminated with a defeat but came through a tense match 6-3 7-5.
He will face Roger Federer in his final Group B encounter on Thursday, with a semi-final place still up for grabs.
Federer earlier beat Kei Nishikori 6-3 6-2 to top the standings after two matches.
"On Sunday, there wasn't much magic," said Murray. "Today I came up with some good shots in the right moments. Milos didn't serve as well as he can and that helped."