Carragher said: "To come to Leverkusen and win 3-1 is a great result. They are a top class opposition and you only have to look at their home record where they scored three goals against Real Madrid and Roma.
"We are in the quarter-finals now and anything can happen. There are some good teams left in the Champions League but it is a good competition and any team can win it. It is not always the best teams that win a cup competition and we feel we have a chance."