Manchester City came from behind to make a winning start in Champions League Group C on Wednesday with a 3-1 victory over Porto at the Etihad Stadium.
City had fallen behind to a fine 14th-minute solo strike from Luis Diaz but a Sergio Aguero penalty brought them level before second-half goals from Ilkay Gundogan and Ferran Torres secured the win.
Pep Guardiola's side, defeated in the quarter-finals last season, struggled to find their fluidity in the opening 45 minutes but as Porto tired after the break, City's quality proved enough.
"If I'm being honest we are struggling at the moment," said German midfielder Gundogan.
"Fernandinho went off at the end, we have players playing in different positions. I am not 100 per cent there because I had Covid, we are not all at the same moment.
"That is the challenge for this season, it's not going to end for a while."
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