The Ecuador international had only just returned to action after a spell on the sidelines. He came on for Riccardo Calafiori in the 82nd minute at the Emirates Stadium, helping Arsenal protect their lead after Bruno Guimarães completed their comeback.
Hincapié then took part in an additional running session after the final whistle, a routine exercise for substitutes who have played only a limited number of minutes. However, he appeared to hurt his right ankle and was helped from the pitch, clutching the affected area.
The incident has raised concerns about his availability for Arsenal’s upcoming Champions League fixture against Lille. The club were yet to confirm the severity of the problem in reports published after Saturday’s match, with further assessment needed before a recovery timetable can be established.
Hincapié joined Arsenal from Bayer Leverkusen last summer on an initial season-long loan. The north London club exercised their option to make the move permanent for a reported £34 million, and he has made 43 appearances for the Gunners.
His latest setback comes at an inconvenient time for Mikel Arteta, who will be keen to maintain his defensive options as the fixture schedule intensifies. Hincapié had already missed matches this season because of injury, making the circumstances of his return particularly frustrating.
The defender’s brief appearance against Leeds had offered encouragement that he was ready to contribute again. Instead, the post-match incident has created fresh uncertainty just as Arsenal look to build on a hard-fought comeback win.
There is no confirmed diagnosis or indication yet of how long Hincapié might be unavailable. Arsenal will need to assess the ankle before deciding whether he can feature against Lille or whether another period of recovery will be required.
For now, the key concern is whether the incident is a minor knock or a more significant problem. Until the club provides an update, his participation in the next match remains uncertain.