Manchester City will be without their left-back Aleksandar Kolarov for at least one month.
"Kolarov has a muscle injury in his calf. He will be out for at least one month," Xinhua quoted head coach Manuel Pellegrini as saying Tuesday.
The 28-year-old Serb sustained the injury in the warm-up session before City's 1-0 victory over Manchester United Sunday.
Joining the club in 2010, Kolarov has earned 92 league caps and has scored five goals.