Former Borussia Dortmund star, Kevin Großkreutz has expressed his shock over Jurgen Klopp’s decision to work with Red Bull. The German gaffer announced during the week that he has decided to work with Red Bull just a few months after he left his job as Liverpool manager. The defender, who played under Klopp in Germany, said he was surprised at his latest choice of employment. Klopp was announced as the new Global Sports Director for the Red Bull Group in the last week. The German schemer had been in charge of Liverpool since 2015 when he resigned from his position as manager in the summer. Gro…