The Arsenal target suffered a hip injury in his side's 4-1 defeat to Paris Saint-Germain on Saturday and will undergo scans to see how severe it is.
Alexandre Lacazette will undergo tests to determine the severity of a hip injury suffered during Lyon's resounding loss to Paris Saint-Germain in the Trophee des Champions.
Linked with a move to Arsenal for much of the summer, Lacazette was substituted at halftime in Lyon's 4-1 defeat to PSG on Saturday.
Lacazette refused to talk about the injury after the game, but coach Bruno Genesio provided an update on the 25-year-old striker, with Lyon sweating on his fitness.