Tonight’s last-16 first leg tie in Porto is the Reds’ first in the knockout stage of Europe’s elite club competition since 2009.
But despite having comfortably won their group with three wins and three draws, scoring 23 goals — a record for an English club — doubts persist about their ability to go deep into the competition.
However, despite recent domestic defeats to Swansea and West Brom Klopp points to their thrilling 4-3 win over Pep Guardiola’s runaway Premier League leaders as all the evidence he needs to believe in their quality.
“I know it already we can compete with them, I don’t have to look at them,” he said.
“I think probably the strongest football team in this moment in Europe is Manchester City and we played them twice already at the highest level (they lost the first encounter 5-0 after having Sadio Mane sent off in a first half in which they more than matched their hosts).
“The Premier League is a little different but if we meet them (City) then we could beat them. That is how it is.
“But it is not important right now. We are in Porto and that is the only thing.
“We can make one mistake, that is how it is in life. And of course we as a team we will never do that.”
The team have already overcome one significant hurdle in reaching the knockout phase for the first time in nine years.
And they did in in style with two 7-0 victories helping them rack up the second-highest tally of group game goals in the history of the competition behind Paris St Germain, who scored 25.
“Yes the last 16 in the Champions League is quite a message already,” he said.
“In other competitions it doesn’t sound too good but here it is already a message.
“But now we have to show that we are not only part of the competition we are quite ambitious. That is how it is and we have to take it seriously.”
Critics predicted January’s sale of Philippe Coutinho would hit Liverpool hard but in light of the goalscoring exploits of Mohamed Salah and Roberto Firmino it has not yet.
The pair have 11 Champions League goals between them - only PSG’s Edinson Cavani and Neymar have scored more – and only Real Madrid’s Ronaldo (nine) has scored more than Firmino’s six.
“We qualified for the Champions League without Phil, he was not involved in either of the Hoffenheim games,” said Klopp. “I don’t think he (Firmino) has stepped up but maybe it is more obvious because his situations are not overshadowed by Phil Coutinho’s situations. That’s how it is. That is all.
“He doesn’t always have to be the stand-out player. As often as he can be, that’s good.
“I don’t know what other people think about Roberto Firmino - I can imagine a bit because you ask me about it – (but) people with a football brain judge him right.”
Liverpool will stay on in Porto following tonight’s clash before flying to Spain for a four-day training camp.
With the Reds out of the FA Cup, Klopp has decided to take squad to Marbella where they will enjoy temperatures of around 17 degrees.
They are expected to return to Merseyside on Sunday. Liverpool have a 10-day gap between matches.
After tonight’s game, Liverpool don’t play again until they entertain West Ham in the Premier League at Anfield on Saturday week.
José Sá, Ricardo Pereira, Reyes, Marcano, Alex Telles, Brahimi, Oliveira, Herrera, Corona, Marega, Aboubakar
Karius, Alexander-Arnold, Virgil van Dijk, Matip, Robertson, Oxlade-Chamberlain, Wijnaldum, Henderson, Salah, Firmino, Mané
Champions League (Rd of 16, 1st leg): Porto V Liverpool
Estadio do Dragao, 7.45pm
Daniele Orsato (Italy)
RTÉ Two, BT Sport
Porto 21/10, Liverpool 13/10, Draw 12/5