Heather Watson exited the BNP Paribas Open at the fourth-round stage after a final-set slump against Carla Suarez Navarro in Indian Wells.
Watson went into the match on a high after a career-best win over world number eight Agnieszka Radwanska.
She dropped the opener to Suarez Navarro, but despite clawing her way back into the contest, Watson fell to a 7-6 (7/5) 3-6 6-1 defeat.
Watson had served for the first set but was broken back by the world number 13 who went on to take it on her third opportunity in the tie-break.
But the Spaniard required a medical time-out for an ankle injury in the process and Watson looked favourite after levelling the match with a dominant second set.
But Watson's composure deserted her and she was broken twice in succession as her run in the tournament drew to a close.
Andy Murray's doubles campaign alongside Thanasi Kokkinakis came to an end at the second round stage when they lost 6-1 6-4 to Nenad Zimonjic and Marcin Matkowski.