Borussia Dortmund will sign on-loan midfielder Nuri Sahin on a permanent deal from Real Madrid.

“We met with Real Madrid officials when the two clubs played in the Champions League quarter-finals, and we have informed them that we intend to make use of the option to buy," Borussia Dortmund chairman Hans-Joachim Watzke told Ruhr Nachrichten newspaper.

Both clubs have agreed not to disclose details of the deal.