"Clearly they are a very good team with a very experienced manager, so they could be dangerous tomorrow," said the Reds boss in his pre-match press conference yesterday.
"PSV are a team with quality - they are not in the best of form at the moment, but they will be well organised and they could play on the counter-attack, so it will be different from the Marseille match.
"Marseille are also a good team with a lot of pace so it was difficult to stop them in the first game.
"It has been reported that they don't have much confidence, but I have a lot of respect for them because they are always near the top of the Dutch league.
"It will be a very tough game and the players will have to be really focused."