French Open 2018: Fourth seed Elina Svitolina knocked out in third round

Elina Svitolina is the highest seed so far knocked out of the 2018 French Open

Fourth seed Elina Svitolina became the highest-profile casualty in the women's draw at the French Open after a surprise straight-sets defeat.

The Ukrainian lost 6-3 7-5 to Romania's Mihaela Buzarnescu, the world number 33 who had never won a Grand Slam match before this week.

But Australian Open champion Caroline Wozniacki eased into the last 16.

Wozniacki, the second seed at Roland Garros, defeated France's Pauline Parmentier 6-0 6-3.

She will next face Russian 14th seed Darya Kasatkina, who beat Greece's Maria Sakkari 6-1 1-6 6-3.

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"Today, really, I was off and couldn't find my rhythm, my game. I was really struggling," said Svitolina.

"On the other hand, she was playing great tennis. She was really, really on the ball."

Play was later cancelled for the day following a heavy spell of rain with eighth seed Petra Kvitova and 10th seed Sloane Stephens yet to start their matches.