"I am not the most calm, because that is not the right word, but it's the fact that since November or December [people say] we are already champions - when I saw the pundits and the people in November, they say it's already done".
They were trying to overturn a three-goal first-leg deficit and were level at 1-1 in the return game when the striker was introduced, but lost 2-1. We have to win two and [against Spurs] we're going to start to do it the way we do it. "It is going to be a hard game for us". That is a good advantage. The players know that, I don't need to tell them.
"He played the last 20 minutes [against Liverpool] and after the game said: 'I can not run, I have a lot of pain, I can not run.' I don't know about Swansea [City, on Sunday-week] if he'll be ready but hopefully for the last games if we need him and especially for the World Cup". "We can not forget he was injured for one month", Guardiola said.
Guardiola's side went on to suffer a shock 3-0 defeat at Anfield and have since lost to Manchester United and Liverpool again.
He admitted that Sunday's game against Spurs would be another hard game for his side.
"But if we score the second goal or we score two or three goals you would see how they run and how aggressive they are".
"When the opponent is good, we will congratulate our opponents on beating us, and after learn from that for the next game".
Aguero picked up a knee injury in training last month ahead of the victory at Stoke City, eventually returning to action last weekend with a 14-minute cameo in City's Manchester derby defeat.