Champions League finalists Borussia Dortmund are now lining up a move for a Leeds United player this summer. Just like Leeds six days earlier, Dortmund were beaten at Wembley as they succumbed to Real Madrid 2-0 to end their dream of lifting European football’s biggest trophy. Leeds, meanwhile, lost 1-0 to Southampton in the play-off final to consign them to a second successive season of Championship football. Due to their failure to bounce back at the first attempt, Leeds know they will have to sell some key players this summer in order to stay compliant with the EFL’s PSR constraints. Having…