Former runner-up Stefanos Tsitsipas kicked off his French Open campaign with a 7-6 (9-7) 6-4 6-1 victory over Hungarian journeyman Marton Fucsovics on Monday.
The ninth-seeded Greek, who won the Monte Carlos Masters this year, showed his range of qualities on clay to set up a second-round meeting with German Daniel Altmaier.
The 25-year-old wrapped up victory when Fucsovics sent a return wide under the roof on Court Suzanne Lenglen.
In the women's competition, top seed Iga Swiatek cruised past qualifier Leolia Jeanjean 6-1 6-2 to launch her title defence at the tournament where she seeks a fourth title on the Paris clay.
The 22-year-old world number one, who has won the French Open three times in the last four years, arrived in Paris on the back of a 12-match winning streak on clay, having rolled through the tournaments in Madrid and Rome.
"Matches like that give me a lot of satisfaction," said Swiatek, who next faces former world number one Naomi Osaka in the second round. "Overall, I am happy with my performance."
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