The Bavarian giants will head into the clash at Camp Nou 4-0 up from the first leg played at the Allianz Arena in Munich last week.
"I have to say Barcelona are still the best team in the world so we will prepare accordingly," he told reporters. "They are capable of great things at Camp Nou and we want to avoid that.
"We will play like we did in Munich, attacking, playing to score – let's see if it works out. We are not a defensive team, even if we do have a good defence."
Borussia Dortmund have already qualified for the final, which will be played at Wembley.