Russian teenager Mirra Andreeva eased into the French Open quarter-finals on Monday with a straight-sets victory over Daria Kasatkina.
The 18-year-old, seeded sixth at Roland Garros, sealed a 6-3, 7-5 win in one hour 34 minutes against Russian-born Australian Kasatkina, ranked 17.
She next plays either third-ranked American Jessica Pegula or France's last remaining player in Paris, Lois Boisson, for a place in the quarter-final.
"It was a hell of a match," said Andreeva.
"Honestly, I'm so so happy I won, I hate playing against her, we practice a lot, and even practice is torture for me."
Andreeva reached the semi-final last year with a shock quarter-final win over Aryna Sabalenka.
She is hoping for another strong performance at Roland Garros, with both Sabalenka and reigning champion Iga Swiatek in the other half of the draw.