That is the belief of assistant coach Peter Krawietz, who demands a concentrated and respectful performance from the Reds in the first leg of their Champions League last-16 tie tonight.
"Our next opponents are FC Porto and a lot of people have said that on paper it looks like one of the better draws," he told the official Liverpool FC magazine.
"But without going into details, we can say that we know that it will be a tough tie because FC Porto is a very big club in Portugal.
"They are a really competitive side, unbelievably strong physically, really smart tactically, and of course they are very, very ambitious, particularly in the international competitions.