Britain's Emma Raducanu was beaten in straights sets by Belarusian world number two Aryna Sabalenka in the third round at Indian Wells.
Raducanu, who reached the fourth round in California last year, lost 6-3 7-5 to two-time major winner Sabalenka as she continues her comeback.
The 21-year-old, ranked 250 in the world, was a wildcard at the tournament following an injury-disrupted 2023.
American third seed Coco Gauff defeated Italian Lucia Bronzetti 6-2 7-6 (7-5).
The US Open champion will play Japan's four-time Grand Slam champion Naomi Osaka or Belgian 24th seed Elise Mertens next.