Nigeria youngster, Kelechi Iheanacho, made his first start for Manchester City but sustained an injury as the citizens pipped Steaua Bucuresti 1-0 in the second leg of their play-offs tie to advance into the group stage 6-0 on aggregate.
Iheanacho pulled up while chasing a pass in the 74th minute and had to be replaced by Fernandinho.
The super eagles star looked to have picked up a hamstring injury and will now be a doubt for the Africa Cup of Nations qualifier against Tanzania next week.
Fabian Delph scored city’s goal in the 56th minute, heading in a cross by Jesus Navas.
They now join English Premier League Champions, Leicester City, Arsenal and Tottenham Hotspur in the group stage.
Meanwhile, the draw for the group stage of this season’s UEFA Champions League comes up on Thursday, august 25, 2016, in Monaco