Heather Watson's run in the Miami Open came to an end in the fourth round with a 6-3 6-4 defeat by Simona Halep.
British number two Watson, 23, led 3-1 in the opening set before losing the next five games to the Romanian.
Fifth seed Halep, 24, broke Watson twice more to win the second set and reach the last eight for the second year in a row.
Heather Watson had to play with a strapping on her thigh to protect a muscle injury.
The 23-year-old Briton said: "I felt fine going into this match but then tweaked it again and became overly aggressive going for stuff you shouldn't usually go for playing against Halep.
"I ended up paying the price, missed a few too many and was pretty inconsistent."