Pep Guardiola called Manchester City's 3-1 victory over Porto a "perfectperformance" after his side came from behind to open their Champions LeagueGroup C campaign with three points.
City were made to work hard after LuisDiaz capitalised on a loose pass from Ruben Dias to put Porto ahead after 14minutes.
But a Sergio Aguero penalty drew City level before the break, andgoals from Ilkay Gundogan and substitute Ferran Torres - the latter on hisChampions League debut - completed the turnaround.