Milan sign Turkey's Calhanoglu from Leverkusen

There were no official details of the transfer fee but German media estimated it was €25 million.

The gifted 23-year-old Calhanoglu has not played since February after the Court of Arbitration for Sport (CAS) upheld a four-month ban imposed by world governing body FIFA over his contract dispute with Turkish club Trabzonspor from 2011.

Trabzonspor lodged a claim alleging Calhanoglu had breached the terms of his contract without just cause when he signed for Karlsruhe in 2011. Calhanoglu was a minor at the time.

Calhanoglu was ordered to pay Trabzonspor €100,0000. He joined Hamburg from Karlsruhe in 2012 and moved to Leverkusen two years later.

"The three years at Leverkusen were very emotional, Calhanoglu said in a club statement. "The support was outstanding especially during my four-month ban."

"Now I want to start a new chapter in my career."