Klopp joins Dortmund legends in epic farewell
A who's who of Borussia Dortmund greats - including Mats Hummels, former coach Jurgen Klopp and current boss Nuri Sahin - returned to the Westfalenstadion pitch to celebrate the careers of the club's Polish legends and back-to-back Bundesliga winners Lukasz Piszczek and Jakub Blaszczykowski.
