Stefanos Tsitsipas proved too good for Argentina's Diego Schwartzman as he storms to a straight set win to reach round four.
6-2, 6-2, 6-3 it finished in favour of the Greek.
Now 20-6 at Roland Garros, the 2021 finalist will meet surprise package Sebastian Ofner, a qualifier from Austria, for a place in the quarter-finals.
"It wasn't easy at all," Tsitsipas said of his straight-sets win. "I know it was three sets, [but it was] so far my most difficult match in terms of concentration and having to stay in there on every single point. Diego did a great job fighting on every single point and not giving me any free points. I knew that I was dealing with that today and that was the biggest asset of his game which I had to take away. Patience — that's what I learned today."
The Greek quickly set the tone by racing out to a 3-0 lead in the opening set. Thanks to his dominance on serve and from the baseline, his lead was never truly under threat — in the opening set or in the match — though Schwartzman made a final push in a titanic start to the final set with the help of some well-timed drop shots.
After the Argentine fought off a break point to make it 1-1 in the third, he created three break chances in a marathon return game that Tsitsipas ultimately survived. The Greek secured his sixth and final break of the match (on 18 break points) in the very next game, then served out the match from 0/30 after seeing two match points go begging in the previous return game. Tsitsipas saved four of five break points against him in the victory despite landing only 54 per cent of his first serves.
"I'm happy because I put out a great fight, and the crowd was by my side, which always helps," said Tsitsipas, who thrilled the crowd with a rare around-the-net backhand winner from beyond the baseline in set three. "I had a great time playing on Lenglen again one more time here. I have a blast every single time that I get to share these emotions with the rest of the fans."