Jamie Murray and Bruno Soares lost their opening doubles match in the ATP Finals against Mike and Bob Bryan.
The American twins saved three set points in the first set before Britain’s Murray and Brazil’s Soares came from 4-1 down to win the second.
But the four-time champions came through 7-5 6-7 (3-7) 10-8.
“We had it on our racquet in a way, then we let it slip – we’ve lost quite a lot of matches like that this year,” said Murray.
“We just need to find a way to do better in those moments and close things out when we have the chance.”
The two pairs, who were both 2016 semi-finalists, will now play Ivan Dodig and Marcel Granollers, and top seeds Lukasz Kubot and Marcelo Melo.
Kubot and Melo beat Dodig and Granollers 7-6 (7-2) 6-4 on Monday in the other Group A match.
Following the conclusion of the eight-team round-robin group format, four doubles teams progress to Saturday’s semi-finals before the final on Sunday.