In a relentless opening period during which Raheem Sterling headed the opener, the champions created numerous opportunities, with only a fine performance from Watford keeper Daniel Bachmann and some poor finishing keeping the score down to 1-0.
But overall, the manager was very happy with his team's dominant display.
“We created more chances than Wednesday, but the game could be over after 15 minutes," said Guardiola. “The most important thing is that we won.
"We played in a consistent way, controlled, we played a good game again.
“I have a lot of respect for Claudio, but it's not that Watford didn't want to do it – we didn't allow it.
“We missed a lot of chances and hopefully next time, we can convert.
“Scoring goals is the most difficult thing in football and we're not specialists but we're playing well and it's important to create the chances."
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