As reported by Marca, Osasuna have agreed with Borussia Dortmund on an option regarding Spanish Under-19 international midfielder Mikel Merino (19) transferred to German club next summer. Iberian club have already cashed 2 million euros, and when the transfer is closed will get 3 more. However, if an overall superior offer comes, Spanish club will be free to accept it, giving back the 2 million euros already cashed to Dortmund of course.
Source: transfermarketweb.com