The Dutch striker said: "Everyone I've spoken to, especially the Dutch players around Europe, know how good Liverpool can be - even if we've not shown it over the last couple of games.
"First we have to beat Inter, and reach the next round, and then we can take it from there.
"The manager and all the players are saying the same thing - keep focused. We played well against Inter but want to play more like that in the Champions League and Premier League now.
"If we can go a long way in this competition like last year, it would make up for the disappointments so far this season. We know we have the quality, we just have to show it on the pitch."