Three-time Grand Slam finalist Ons Jabeur overcame Jelena Ostapenko in straight sets (7-6 7-5) to reach the last 16 of the Mubadala Abu Dhabi Open, while Emma Raducanu suffered a disappointing early exit at the hands of Marketa Vondrousova.
Elsewhere, Belinda Bencic, Leylah Fernandez, Magda Linette and Linda Noskova all progressed on day four of the tournament.
