Phil Foden first-half strike proved decisive as Manchester City secured a place in the Champions League last 16 following a 1-0 win against Olympiacos.
Manchester City dominated possession but wasted a number of goal scoring opportunities in the game.
After stiff resistance by the hosts , Foden broke the deadlock and ultimately won the game.
Olympiakos rallied slightly towards the end with their two efforts but could not find the equaliser.
It sends Man City into the knockout stages for the eighth successive year, with four wins from four group games this season as they search for their first Champions League title.
Olympiakos stay third in Group C with qualification for the Europa League still within their reach.