Liverpool striker Roberto Firmino wants to make Porto "suffer" in their Champions League last-16 first-leg tie.
Wednesday's game at the Estadio do Dragao will be Liverpool's first match in the knockout stages of the competition since 2008-09.
They topped their group scoring 23 goals, a record for an English club and a total surpassed only by Paris St-Germain's tally of 25.
Reds goalkeeper Loris Karius will keep his place ahead of Simon Mignolet,
"I don't know if Porto are going to be afraid but we are going to make their life difficult and make them suffer," said Firmino, who has scored 20 goals in all competitions, including six in the Champions League.
Midfielder Emre Can is suspended for the tie, defender Joe Gomez has travelled with the squad after missing the last two matches with a knee injury while £75m record-signing Virgil van Dijk is set for his first appearance in the competition for the club.
Klopp insists his side can compete with the continent's elite, having beaten "Europe's strongest football team" Manchester City 4-3 in the Premier League in January.
"I know it already, we can compete with them, I don't have to look at them, "Klopp added.
"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."
Match facts
Liverpool are unbeaten against Porto, having played them four times in all competitions (Won two, drawn two). Their two encounters in Portugal both ended in draws.
Their only previous encounter in the knockout stages of a European competition was in 2000-01 in the UEFA Cup quarter-finals. Liverpool won 2-0 on aggregate and went on to lift the trophy later that season.
Porto have lost their last three Champions League knockout games.
Porto have reached the knockout stages of the Champions League in consecutive seasons for the first time since 2009/10. They haven't progressed past the quarter-finals since they lifted the trophy in 2004.
Liverpool were one of four teams to remain unbeaten in this season's Champions League group stages, alongside Barcelona, Besiktas and Tottenham.
Porto scored more goals from set-piece (eight) than any other team in this season's Champions League group stages.
Only PSG's Parc des Princes stadium (16) produced more goals than Porto's Dragao (15) in this season's Champions League group stages.
Porto's Vincent Aboubakar has scored five goals and delivered two assists in this season's Champions League - the most prolific campaign of his career.

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