Barca left the Etihad with a 2-0 lead in the tie.
"I'm satisfied by the result. We had possession of the ball and it has been a very good script for us," said Valdes in the mixed zone.
"For any road game in the Champions League, we know there will be an opening 20 minutes that we will suffer.
"Right now, looking forward, we have the result you want."
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