With City having netted six for the second successive game, Guardiola also urged his side to ride the crest of the wave.
"I am really happy," he reflected. “We made again an incredible performance in the way we attack and defend.
"The only problem is if we believe it is easy - it's not.
"We are unfortunate not to have qualified but we are so close. We need to keep and maintain that level.
"Tonight, we are not going to think too much about the derby. We are going to enjoy that [victory].
"After the defeat to Lyon and the goal in the first minute in Germany, it was so complicated.
"We have reacted really well. We are in a good position but it is not done.
"We have to keep focused on what we have to do. Tomorrow, we will start to focus on United."