Andy Murray blew seven match points during his 4-6, 7-5, 6-7 (9) defeat to lucky loser Dominik Koepfer in the first round of Paris Masters on Monday.
Murray served nine double faults and landed only 49% of his first serves. He also made 36 unforced errors.
“I didn’t deserve to win the match. I didn’t play well enough to win,” Murray said.
“I had a ton of opportunities at the end to do it, but the way that I was playing tonight was not good enough.”
Ranked 144th in the world, Murray received a wild card in his stuttery quest to come back from hip surgery and improve his ranking and get easier draws next season.
His singles win-loss record is 13-13 this year.
The two-time Olympic champion got off to a poor start and dropped the opening set with a shanked forehand return.
Koepfer led 6-4, 5-3 but Murray raised his game and won four straight games to level the set score.
In the decider, Koepfer saved two match points at 5-4 with a smash and a backhand winner before saving five more in the tiebreaker. They went for three hours.
Fellow Briton Cameron Norrie, who eased past Federico Delbonis of Argentina 6-2, 6-1, remains in contention for the ATP Finals.