However City were unable to add to their lead, mainly because of the officials terrible mistake in disallowing Leroy Sane's goal, and in the second half Liverpool contained the hosts and scored twice from their few chances, Mo Salah levelling on the night and Roberto Firmino giving the Reds a 5-1 aggregate lead.
Going into Tuesday's clash with a 3-0 first-leg win, Liverpool were rocked early in the game as Gabriel Jesus scored on three minutes.
"When you concede one goal and score five against Manchester City I think we should respect Liverpool more".
A Liverpool fan has gone viral after he correctly predicted the events in the club's Champions League match at Manchester City.
"But whoever we get will find it hard to come to Anfield and score some goals".
"I said [to Lahoz] it was a goal, I didn't insult him", Guardiola said. But I know him [Lahoz] from Spain, so I could imagine that.
Despite a handsome aggregate win, Milner said Liverpool have to be better whoever they are drawn against in the semi-finals.
"I said he (the referee) was wrong", said Guardiola when asked about his dismissal. "This competition is unbelievably strong. But Mateu Lahoz is a special guy, he likes to be different, he likes to be special", he said.
However, that does not mean they head into the semis with any sort of inferiority complex. "We are here and we deserved it, and I am really happy about that".
"The ball for Sane came from James Milner. It would have been different to go in 2-0", Guardiola had said at the post-match media conference. Ederson, who was injured in a controversial collision with Mane last September, reacted angrily to the Liverpool man and both players were booked.
The boss is keen to build on the team's domestic success as well as ensure a more successful challenge in Europe next season and, according to the Daily Telegraph, he will again look to bolster his squad in the summer transfer window.
"In these kind of games, in these competitions, the impact is so big".
And when speaking to the Brazilian media after the 2-1 defeat, Manchester City striker Gabriel Jesus claimed he didn't even notice the manager wasn't on the team's bench at first.