Second seed Stefanos Tsitsipas, Monte Carlo champion and Barcelona finalist on the dirt, insured himself a quarter-final spot with a 6-1, 6-4 defeat of American Tommy Paul on Thursday.
The Greek winner is playing the French Open run-up tournament for the first time; he wrapped up victory in an hour and a quarter without facing a break point.
He has now reached at least the last eight in four of five clay outings this season.
“I took control early on, and after that I didn’t let go,” Tsitsipas said. “I was playing good tennis today.
“I was able to move him around the court and find angles, press with my forehand.”
The ATP No. 5 added: “It wasn’t my best day on serve, but I found solutions when things proved difficult.”
Tsitsipas will aim for the semi-finals against Japan’s Yoshihito Nishioka, who added more misery to the luckless season of Gael Monfils with a 4-6, 6-3, 7-6(2) defeat of the Frenchman..