Bundesliga champions Bayer Leverkusen are still hurting after a tough 3-0 defeat to Atalanta in the Europa League final on Wednesday, but coach Xabi Alonso said that they will use the pain to win the German Cup final on Saturday. “The pain from Wednesday is still fresh. We will use this to win tomorrow. We will forget about Dublin for now and we are only thinking about tomorrow’s game,” Alonso said in a news conference on Friday. Leverkusen’s dream of a treble winning season were shattered after the defeat to Atalanta, but they can still achieve a maiden domestic double if they defeat Kaisersl…