However, after a verbal kick up the backside from Lovren and some tactical input from Klopp, the second half proved to be a totally different affair with Mohamed Salah and Roberto Firmino scoring to secure a 2-1 win and 5-1 aggregate victory.
"It's different when the first goal in Anfield is offside", Guardiola said.
Semi-final first-leg ties are on 24 and 25 April and second legs are on 1 and 2 May.
And the Egyptian was clearly distracted as he responded by saying: "Yeah, it's a good song, I like it!"
The last two Champions League semi-finalists will be decided on Wednesday night.
Raheem Sterling, Leroy Sane and David Silva are all capable of contributing goals but as City struggled to break down Liverpool on Tuesday despite their waves of attack, the absence of a physical presence in attack was noticeable. "I was polite, I was correct", Guardiola said.
"I think we made a step forward in terms of personality to play these kinds of [Champions League] games, like I never said before", he added.
"It's too much to send [me] off because I didn't say any wrong word".
While Waddle says Liverpool won't want to face the prospect of playing Real Madrid in the last-four, Serie A specialist James Horncastle believes Roma's superb win against Barcelona has sent out a shock wave across Europe.
"In this competition the teams are so equal and the influence of refereeing decisions is so important".
In his first season, Klopp guided Liverpool to the 2016 Europa League final where they lost to Sevilla but he is now contemplating a leap upwards in terms of quality of opposition.
"This team is ready to fight with all the teams but the other teams are so good, it is hard - a mountain - but we can compete, especially at home".
Fired-up by that breakthrough and with the crowd roaring them on, City were first to every ball, applying constant pressure on the Liverpool defence while Juergen Klopp's side were unable to earn some respite. "Big congratulations to Liverpool", he added. We are here and we deserved it, and I am really happy about that.