Novak Djokovic began his latest bid for a record-breaking 25th Grand Slam singles title with a commanding win over Mackenzie McDonald.
The former world number one ended his wait for a 100th ATP singles title in Geneva last week and maintained his recent upturn in form with a 6-3 6-3 win over the 98th-ranked American.
Djokovic – who turned 38 last week – has now won all 21 of the first-round matches he has played at Roland Garros.
Sixth seed Djokovic will next play the winner of the all-French match between Corentin Moutet and Clement Tabur.
Djokovic arrived in Geneva without a win on clay in 2025, having suffered first-round exits in both Monte Carlo and Madrid.