The Italian champions had conceded just one goal in their previous 16 games before Tuesday's match, and had not conceded in 2018 until Harry Kane rounded Gianluigi Buffon to score.
Liverpool will unleash one of Europe's most prolific attacking partnerships on Porto when the two sides meet in the last 16 of the Champions League today. "That's good. I said to him after the last game "finally you're back" immediately after when we talked on the pitch", Klopp was quoted by SkySports.
Liverpool travel to Manchester United four days after the second leg against Porto in what will prove to be a huge game in their pursuit of cementing a place in the top four.
Mane stole the show with a hat-trick, but all three of their star forwards played a major role, with Salah scoring their second and Firmino getting the fourth.
The Reds were taking part in the Champions League knockout stage for the first time since 2009 when Spanish coach Rafael Benitez was still in charge of the five-time European champions.
While Egyptian Salah's goals have been a revelation since his move to the club a year ago, it has been the performances of Brazilian Firmino that have been just as important.
"That makes it even more exciting so congratulations Mo, but hopefully it won't stop. But it's of course very important for us", he told a news conference. It was really good tonight. Interestingly, the victory brings into play an omen which would excite Reds fans... on those other two occasions; their side won the European Cup.
"If you think it's about alcohol, they don't drink".
Ronaldo put Real in front in the 83rd minute with a scrappy strike from close range and Brazilian left back Marcelo further stretched the lead in the 86th, giving PSG a tough task in the second leg at the Parc des Princes on March 6.
"As I said a few times, I am too long in the business to think anything is sorted before the final whistle".