Bundesliga side Borussia Dortmund advanced to the DFB Pokal (German Cup) semifinals after a confident 4-0 win over fourth division team Holstein Kiel on Tuesday.Holstein Kiel staged a confident performance from the start although they were unable to prevent two fast goals within the first half.Dortmund striker Robert Lewandowski opened the scoring at the 11th minute with a well placed shot into top right. Only seven minutes later \"BVB\" midfielder Shinji Kagawa doubled the lead when he netted into top left to shock the dedicated host at the sold-out Holstein stadium.After interval Kiel was unable to set the \"BVB\" under pressure thus the guests extended the lead to 3-0 through joker striker Lucas Barrios who slotted home from close range.With three minutes remaining Dortmund midfielder Ivan Perisic scored with a direct free-kick to mark the final 4-0 score.\"Kiel was a difficult opponent but we remained focused throughout the match,\" said Dortmund coach Juergen Klopp.The following teams will clash Wednesday for the other tickets for German Cup semifinals: Berlin hosts Monchengladbach, Hoffenheim faces second division team Greuther Fuerth and Stuttgart\'s plays record champion Bayern Munich.