Britain's Jamie Murray and Australian John Peers suffered a dramatic defeat by the Bryan brothers to go out of the ATP World Tour Finals in London.
Murray and Peers lost 6-7 (5-7) 7-6 (7-5) 16-14 after squandering five match points, including four from 9-5 up.
American top seeds and reigning champions Bob and Mike Bryan move into the semi-finals on Saturday.
Murray and Peers were playing together for the last time before teaming up with new partners for 2016.
The Scot, 29, will play with Brazil's Bruno Soares in 2016.