Manchester City and England defender John Stones will be out for between four and five weeks after suffering a muscle injury in training.
The 25 year old suffered the injury on Tuesday as City prepared for Wednesday's Champions League group game with Shakhtar Donetsk.
"He (Stones) is out four, five or six weeks. He was injured in training this morning. It is a muscular problem," boss Pep Guardiola said.
"For me as a manager it is an incredible challenge. But I believe in something people don't know about - spirit and commitment. We will make steps forward to solve this problem," Guardiola added.
