Bundesliga fixtures (Today)Leverkusen   v  Bayern Munich Hamburg SV   v      VfB Stuttgart Hannover 96   v   FC Augsburg Hertha Berlin   v     W. Bremen Kaiserslautern  v  VfL WolfsburgSC Freiburg   v Schalke 04 Dortmund   v   Mainz Borussia Dortmund are looking to set a new club record by claiming their eighth straight victory today when the leaders host Mainz in the German league.Having opened a four-point lead at the top, Dortmund have won all seven matches this year, including a German Cup quarterfinal, and are unbeaten in their last 17 outings.Dortmund are set to be up against ex-striker Mohamed Zidan who is looking to score for the fifth consecutive match having netted in all four league games since his switch to Mainz in January from the German champions.With 52 points to their credit, Dortmund have almost double the amount of points of Mainz.But the Rheineland club are on the rise and are unbeaten in their last five games after enjoying a 4-0 drubbing of Kaiserslautern last Saturday and Dortmund coach Jurgen Klopp says his team must be on their guard."We’ll be meeting a self-confident opponent who is trying to come up with something for this game,” said Klopp.Klopp is hoping to have Poland striker Robert Lewandowski fit after he pulled out of his country’s goalless draw against Portugal on Wednesday with a thigh problem.