British number one Emma Raducanu bowed out in the third round at Indian Wells as Croatia's Petra Martic claimed a hard-fought win in California.
The match swung back and forth, and Raducanu, 19, had a chance to serve for the win at 5-4 in the deciding set.
But Martic, the world number 79, took the last three games to win 6-7 (3-7) 6-4 7-5 against the US Open champion.
Raducanu, the world number 13, will now prepare to play at the Miami Open from 21 March.
The Briton won four straight games to lead 5-3 in the first set but Martic broke back to force a tie-breaker, which Raducanu won with a superb passing shot.
Martic led 4-2 in the second and although Raducanu levelled it up at 4-4, Martic took it into a decider after claiming her third break of the set.
Raducanu was on the brink of victory after breaking Martic for a second time in the decider to go 5-4 up but Martic again fought back, dropping just two points in the last two games.
The 31-year-old finished with three breaks in the final set to set up a meeting with 28th seed Liudmila Samsonova in the last 16.