But Bobby Firmino got the goal he deserved shortly after, and with a suitably dramatic celebration afterwards, he scored Liverpool's 4th.
After a hiatus of nine years, Liverpool returned to the knockout stages of the UEFA Champions League and made a statement as they put five past Portuguese side, FC Porto.
The Reds boss claimed his side's performance was "exactly as good as necessary" as a heroic hat-trick from Sadio Mane and stunning strikes from Mohammed Salah and Roberto Firmino give Liverpool a comfortable lead for the second leg at Anfield.
"I think if you score away it's already a good result because it counts more than when you score at home", Wijnaldum said.
"Porto are really strong, very experienced, very aggressive, very physical", Klopp also said on Tuesday.More news: Slovenia upsets US men's hockey in opener
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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.
Klopp's men are now the top scorers in this season's Champions League, surpassing PSG, and have netted 24 goals in their last five matches in the tournament. "Good, really good, and I am happy about it". "Congratulations but hopefully he [Salah] will not stop".
"I think that's the most important thing", the Netherlands worldwide told Liverpoolfc.com, after being asked whether it's significant to keep in mind the fact Wednesday's clash only represents the first half of the tie. Interestingly, the victory brings into play an omen which would excite Reds fans... on those other two occasions; their side won the European Cup.
Their combined tally of 49 is second only to the 55 of Luis Suarez and Daniel Sturridge in 2013/14 and with a third of the season to go, they look sure to set a new mark. You have to cause them problems, problems and problems. We owe our supporters at Anfield a 100 percent performance and that's what we want to deliver.
"On one occasion we sought to break out quickly from the back in a move that started with our goalkeeper but we lost possession and conceded the first".