Leeds United are being linked with the signing of a new right-back on a free transfer from a huge European club, and it has now been reported why he is not signing a new deal. It emerged earlier this week that Borussia Dortmund and Germany defender Marius Wolf could emerge as an option for Leeds this summer, with the 28-year-old set to his contract expire at the Westfalenstadion. With Dortmund in the Champions League final, it means that the five-time Germany ace could play his last game for the Bundesliga giants against Real Madrid at Wembley on June 1, if he gets off the bench. Wolf has mana…