Porto coach Sergio Conceicao says they won't be underestimating Barcelona in tonight's Champions League clash.
Barca go into the game struggling for form.
But Conceicao says: "I would like to point out that we are faced with two clubs among the most present in the top team competition in the world. This says a lot about the history of this match.
"These crises, or pseudo-crises, are temporary especially because there are players who are great champions. In the less beautiful moments, they take something else from within themselves.
"They lost against Real Madrid in a very competitive match, perhaps they had little luck against Shakhtar. We will find a very strong team with many good players. A coach with a lot of experience in this competition and others.
"They have already won titles, it won't be easy for anyone, tomorrow we expect a very strong Barcelona."
