http://gty.im/475127850 Waleed Yassin previews Saturday evening’s German Cup clash between Borussia Dortmund and Wolfsburg. Jurgen Klopp is looking forward tonight to win his second German Cup with Borussia Dortmund in his last match as their manager. The match will also be Sebastian Kehl’s last for Dortmund, with the 35-year-old midfielder set to retire at the end of the season after 14 years with the team. Borussia Dortmund were bottom of the Bundesliga in February but recovered to secure seventh and a Europa League place with victory over Werder Bremen in Klopp’s final home game in charge. However, Jurgen Klopp has said: “It was our target at…