But Lovren issued a stern warning to his team-mates at the interval, telling them to be more aggressive, and the Croatian's blast settled Liverpool's nerves.
"He wanted me and Virgil to be more compact and push the team up but it was quite hard, you know, to push up when City had the ball".
Perhaps that was the hint Liverpool needed to recover their confidence and whatever Klopp said to his team at half-time, there was another distinct shift which became obvious as soon as the second-half started.
"I needed to remind the guys that we had 50 minutes to be in the semi-finals of the Champions League and we needed to give more".
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While they have also played some brilliant football in all those matches, there is no doubt this week has taken some of the shine off a wonderful season which, sooner or later, will result in the English league title.
And a different Liverpool emerged for the second half, with their increased attacking intent being rewarded when Salah produced a classy dink to draw them level on the night shortly before the hour mark. It's unclear what Guardiola said, but it was enough for him to have been sent off at halftime of Liverpool's massive win.
An incredible season had seen Barcelona go 40 matches unbeaten in La Liga and the Champions League, but Roma summoned a fightback that brought back memories of Barca against Paris Saint-Germain last season.
"It was weird because we didn't catch up well from the beginning. But we have to reflect and think what we can do better next season".
"We played for 10 months amazingly", he added.
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Klopp, who guided Borussia Dortmund to the 2013 Champions League final where they lost to bitter German rivals Bayern Munich, says it is far too early to claim Liverpool can be the equals of European giants Bayern Munich and Real Madrid.
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.
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It is thought that the royal couple don't have long to wait before welcoming a sibling for Prince George and Princess Charlotte . If the Royal Baby is born April 21, the child will share a birthday with the Queen, who turns a spry 92 this year.