Manchester City demolished Sporting Lisbon in the Champions League last night – then claimed they have room for improvement.
City left Portugal with a statement five-goal advantage before next month's second leg as Pep Guardiola attempts to mastermind another run to the Champions League final.
But Bernardo Silva – who scored twice - believes they have another level to reach, which serves as a warning to their European rivals.
'I think in the first half we weren't that good to be winning 4-0, we were a bit sloppy, lost some easy balls to let them counter,' Silva said.