Pep Guardiola confirmed Kevin De Bruyne will be out for "a few weeks" after being forced out of Manchester City's opening-day win at Burnley.
City launched their defence of the Premier League title by cruising to a 3-0 win at newly-promoted Burnley as Erling Haaland struck twice in the first half before Rodri slammed home a third midway through the second.
Victory over former City captain Vincent Kompany's Burnley was tainted by De Bruyne's 23rd-minute withdrawal, with Guardiola revealing his talisman had injured the same hamstring that had kept him out at the end of last season.
Guardiola said: "Hamstring again. Same position. It depends on the magnitude of the injury, but will be a few weeks out."
De Bruyne returned from a similar problem in time to start in the Champions League final in June but lasted only 36 minutes.
Asked if the Belgium midfielder had returned too soon to start against Burnley, Guardiola said: "Maybe. Maybe it was my mistake, but when he is injured after 15-20 minutes it is not something wrong, when it is 65 it is the fatigue of the muscle.
"We have to talk with the doctors and him. He was one year a long time injured, he came back from that position.
"He is down. He fought a lot. The final of the Champions League. He felt really good. I prefer to start and make 50-55 minutes. He is disappointed, but he is strong and will be back."
Guardiola appeared to be involved in a furious bust-up with Haaland as the players left the pitch at half-time and the Spaniard explained why both were so animated.
He added: "We discuss a lot. Erling wanted the ball immediately and Bernardo (Silva) don't give it, it was one minute left and 0-2.
"A minute earlier (the ball went) to Mateo Kovacic and we lost it. We have to finish at 0-2 and go to the second. I understand Erling, he wanted the ball, but Bernardo took the right decision."
