Britain's Emma Raducanu suffered another early exit as she was beaten by Katerina Siniakova in the second round of the Miami Open.
Raducanu served for the match in the third set but ultimately lost 3-6 6-4 7-5 to the erratic Czech.
The US Open champion, 19, has won just two of her seven matches this season.
Earlier, compatriot Heather Watson claimed her first win over a top-20 player since 2020 with a 4-6 6-3 7-6 (7-4) victory over Elina Svitolina.
Watson saved a match point on her way to victory over the 20th-ranked Ukrainian.
It is the first time in six years that Watson has reached the third round in Miami.