Coco Gauff suffered a surprise early exit from the Qatar Open on Tuesday with a straight-sets defeat by Ukraine's Marta Kostyuk, while Elena Rybakina eased into the last 16.

The world No. 21 scored her ninth Top 10 victory in just over an hour on Tuesday, handing Gauff a second straight loss of the 2025 season.

Heading into her second-round match against Marta Kostyuk, the 20-year-old Coco Gauff had won 17 straight against opponents ...