Rafael Nadal demonstrated his fighting qualities once again to battle back from behind to beat Stefanos Tsitsipas and keep his ATP Finals hopes alive.
Nadal, who would have been eliminated with a defeat, won 6-7 (4-7) 6-4 7-5 in their final group match in London.
However, the Spanish top seed will still not make Saturday's semi-finals if defending champion Alexander Zverev beats Daniil Medvedev later on Friday.
With Tsitsipas already through, Zverev can join him at Nadal's expense.
Nadal, 33, is relying on a favour from Russian fourth seed Medvedev, who has been knocked out of the tournament by the 18-time Grand Slam champion's win.