Daniel Elahi Galan defeated Valentin Royer at Roland Garros in the first round on clay, winning 7–6, 6–3, 3–6, 6–7, 7–5 in an upset of the pre-match favourite. Royer entered as the odds-on favourite at 1.85 to Galan's 2.07, but the Colombian recovered from dropping the third set and a fourth-set tiebreak to seal victory in the deciding fifth set. The match proved a gruelling affair across five sets, with both players trading breaks of serve and momentum shifts throughout. Galan's resilience in closing out the contest under pressure demonstrates his ability to compete at the Grand Slam level, while Royer's failure to convert his favourable position represents a costly opening-round exit.