After winning the German league title by eight points from Bayern, Dortmund continued their domination with their fifth consecutive win against Munich in the sold-out final at Berlin’s Olympic Stadium.

Bayern Munich coach Jupp Heynckes admitted the Champions League finalists suffered a defensive “catastrophe.”

“We have to take the blame and we did not deserve to win,” admitted Heynckes. “We still have a major goal in mind and I think we will have all recovered from the shock by the Champions League final. That will be a completely different game.”

Unbeaten in their last 23 games in all competitions since last December, Dortmund have yet to lose in 2012.

Poland striker Robert Lewandowski netted a hat-trick in the rout which will dent Bayern’s confidence ahead of next Saturday’s Champions League final against Chelsea at Munich’s Allianz Arena.

Goals by Japan star Shinji Kagawa, a penalty from Germany defender Mats Hummels and Lewandowski’s treble cancelled out Arjen Robben’s first-half penalty for Bayern and a second-half strike from France’s Franck Ribery.

Goal-scorer Robben admitted the defeat hurt. “When you lose 5-2, that hurts. I have no explanation for the game,” he said. “Now it’s frustrating, but on Monday, it’s all about the Champions League final.”

Germany’s number one goalkeeper Manuel Neuer capped a poor night in Bayern’s goal when he lost possession to allow Lewandowski to head his third goal nine minutes from time and claim his 30th goal of the season in all competitions.

“We were the better team over 90 minutes, but we made glaring errors and invited Dortmund to attack us time and time again,” said Bayern captain Philipp Lahm.

“Dortmund exploited their chances and we can’t afford to make those mistakes next week.”

Germany coach Joachim Löw admitted he was shocked by the margin of Dortmund’s win.

“I would never have expected such a result,” he said. “Mainly because of Dortmund’s second half performance, the victory was deserved. Bayern need to produce a huge reaction now against Chelsea.”

“That was a cup final which no one from Dortmund could have better imagined,” beamed Dortmund coach Jurgen Klopp after what was his first cup win.

“We were ice cool in our finishing and scored great goals. It’s hard to put into words what has happened to us.”

Dortmund captain Sebastian Kehl said the German champions deserved the win.

“Bayern are a very, very strong team and we had to work hard,” he said. “I think we’ve shown that we are genuine champions again, we were always there.”

AFP/jlb