Arsenal have announced the sale of Oguzhan Ozyakup to Besiktas.
The 19-year-old midfielder represented the Gunners twice at senior level, making substitute appearances in the Carling Cup victories over Shrewsbury Town and Bolton Wanderers last season.
Ozyakup, who joined the Gunners from AZ Alkmaar in September 2008, helped the Under-18s to a league and cup double in his first season before going on to play a key role in a second FA Premier Academy League title the following year.