Manchester City manager Pep Guardiola says the club are still waiting for doctors to confirm the severity of the injury sustained by key midfielder Rodri.
The 28-year-old Spain international was substituted in the 21st minute during City's 2-2 Premier League draw against Arsenal on Sunday after injuring his right knee.
Rodri appeared to twist the joint in a collision with Arsenal's Thomas Partey at a corner.
Asked to confirm whether he expects Rodri to be out for a "little while", Guardiola replied: "Yep.
"We are still waiting for the decision of the doctors, exactly what he has.