Kevin De Bruyne suffered an injury scare as League Cup holders Manchester City moved into the quarter-finals with a 2-0 win against Fulham.
There was concern for De Bruyne after the City midfielder limped off with what appeared to be a knee injury in the closing minutes on Thursday.
De Bruyne, 27, only recently returned from another knee problem that forced him to miss two months this season, limiting him to five appearances to date.
City manager Pep Guardiola will hope his influential Belgian star is able to make a quick recovery as they head into a busy period featuring crucial Champions League fixtures and the Manchester derby.
"He's being checked by the doctor. Right now I don't know if it's nothing or something serious," Guardiola said.
Until the injury, Guardiola felt it was the most complete performance of De Bruyne's comeback, but now he must fret over his fitness again.
"I think today Kevin is back. The Kevin we know," he said. "Today he was involved in offence and defence. Hopefully what happened in the last minute is not serious."
"We want him. In the end it won't depend on us, it is them. It is the agent, him, his family, they will decide."
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