Javier Mascherano says it is only a matter of time before Robbie Keane finds his feet at Anfield. The Argentina midfielder has backed his team-mate to overcome a shaky start to his Liverpool career and establish himself as a key member of the team. The Republic of Ireland international has failed to score in his first ten games for the club since his £20million move from Tottenham Hotspur but Mascherano isn't worried.

"Robbie Keane is a great player, and now he is playing in a different system to what he was used to at Spurs," he said. "He must get used to the different way that we play, but of course I believe he can have a great partnership with Fernando Torres.

"Robbie has scored lots of goals in his career and he will do the same here."

Mascherano returns for tonight's Champions League match with PSV Eindhoven after missing the Merseyside derby victory with a calf problem. Rafael Benitez, the Liverpool manager, is wary of complacency despite Liverpool enjoying three victories over their Dutch rivals in the past three seasons.

"PSV are a different side with a different manager and many players since the last time we played them in Europe," Benitez said. "Yes, we have beaten them at Anfield twice, but that is when things can be dangerous. People expect things to happen.

"The fact that PSV lost their opening group match to Atletico Madrid is also a problem for us. They have to get something here now and they will sit and defend and try to catch us on the counter-attack.

"Now when we are in a good situation, people are really happy, and everybody is expecting to see the team playing well and scoring goals.

"But I think it's more important to be concentrated, to be focused and keep on winning."

Liverpool, unbeaten this season, can all but end PSV's interest in the competition tonight, but Benitez, who takes charge of his 250th Liverpool game, said: "When you are playing well and winning games, with everyone talking about how good you are, it is important to calm down and get people talking only about the next game.

"It is dangerous when you hear people talking well about your team, then we have to make sure we do not listen to what is being said but just concentrate on the future."