Erling Haaland netted both goals as Man City cruised past Porto 2-0 in their Champions League opener.

Despite Diogo Costa producing a remarkable eight-save performance to earn Player of the Match, the Porto goalkeeper could not prevent Haaland from finding the net twice. City's clinical finishing proved the difference on a night where Costa's 22 long balls and 61 touches underlined his tireless efforts in a losing cause.

Man City: Erling Haaland 47′, Erling Haaland 90′

Porto 0-2 Man City