Manchester City boss Pep Guardiola says Kevin de Bruyne will undergo an injury scan on Sunday.
In the FA Cup semifinal defeat to Chelsea, the Belgian playmaker sat down on the turf after losing possession to N'Golo Kante, though there was no contact between the pair.
De Bruyne went off with 48 minutes played and City face an anxious wait to learn the extent of the problem.
“He has pain now," said Pep.
“Tomorrow he has a test with doctors. Apparently it doesn't look good but we will see tomorrow."