Like at Liverpool, where Klopp won eight trophies including the Premier League and Champions League, the German is seen as a hero at Dortmund. He led BVB to two Bundesliga titles and reached a Champions League final, before losing to Bayern Munich at Wembley. If he did rejoin the club, this role would be less demanding than a managerial position - meaning current boss Edin Terzic could stay in charge and Klopp could have an easier ride, perhaps.