Manchester City boss Manuel Pellegrini insists Sergio Aguero's injury is not serious but he is still unsure when he and skipper Vincent Kompany will return.

Asked if Aguero's injury was proving more serious than thought, Pellegrini said: "No, but it is an injury that he cannot work (on). He needs time to recover from that problem but it is not a serious injury, it is a pain injury.

"We hope (he will return this week) but we must see the way he improves in the next days. When he can run with normality he can work but if he cannot operate with his heel it is very difficult for him to do."

The Chilean is also uncertain when influential captain Vincent Kompany might be back in the reckoning.

The Chilean said: "Vincent is improving. He is doing some tests on his calf, on which is the best way for him to improve. We will see in the next days when he can return."