Dormund, Germany: Borussia Dortmund continued their summer spending spree by snapping up Turkey's highly rated teenage international winger Emre Mor from Danish side FC Nordsjaelland on Tuesday.
The 18-year-old has emerged as one of Turkey's great hopes as they head into the European Championships in France.
Mor said on Instagram that he was "very honoured and happy to be part of theDortmund family and to play in one of the biggest clubs in the world."
The winger has lived all his life in Denmark and only received Turkish citizenship earlier this year, following intervention by Turkey coach Fatih Terim.
"It's great that we can attract talents with Emre's qualities to our academies, and then bring them on to the biggest clubs in Europe," FC Nordsjaelland sporting director Carsten Jensen said.
"This agreement will stand as the best in the club's history, and is obviously unique, because otherwise we would not have chosen to sell him before the European Championship finals.".
The clubs agreed not to disclose the fee for Mor.
Dortmund have made a flurry of signings in recent weeks, with Mor becoming the fifth new recruit over the summer, following Bayern Munich reserve midfielder Sebastian Rode, who joined rivals Borussia Dortmund on a four-year contract for a transfer fee of about 13 million euros ($15 million, £10 million) on Monday.
The 25-year-old, who never made the breakthrough at Bayern, will attempt to fill the boots of German international Ilkay Gundogan, who has moved to Manchester City.
Rode arrives at Dortmund after they swooped for France Under-21 winger Ousmane Dembele, Marc Bartra from Barcelona and Mikel Merino from Spanish side Osasuna.
"Since my childhood I have been a fan of Dortmund," Rode said.
Dortmund, who were distant runners-up to Bayern in the season just gone, have lost two Germany stars after Mats Hummels' departure to Bayern was followed by Gundogan joining City for a reported £21m euros.