The Canadian international, who has netted 23 goals this term, hopes they can overturn a 2-1 loss in the away leg.
On game preparations, he stated: "I think as usually we prepare for this game in a big way. The team is tougher, but there is no difference to how we prepare for a normal game."
On how they can win, he added: "Like international games and European games, we know that we need to be perfect and we can't make any mistakes. It is about the small details and we need to get ready for that and be prepared to score when we get around the box."
On the first leg loss, he stated: "We missed the equalizer after they scored early which changed the game a bit. We had three great chances to score in the first half. We know what Villa is a very good team.
They are fourth at the moment which means something. They have physical and tactical impact across the field so we know it will be a tough game to play."