Leverkusen came into the game on the back of two defeats and a nightmare 4-1 drubbing by Zenit St Petersburg in the UEFA Cup quarter-final first leg.
But Stefan Kiessling gave Leverkusen the lead in the 51st minute and Michael Skibbe´s looked to have secured an away win until Alexander Frei levelled in the 87th minute and Dede snatched a winner for Dortmund three minutes into injury time.
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