Besiktas are chasing Chelsea defender Kenneth Omeruo.
The Daily Express says Omeruo, 22, is yet to make an appearance for the Blues four years after joining the west London club.
He has been sent out on season-long loans to Dutch outfit ADO Den Haag, Premier League new boys Middlesbrough and most recently Turkish side Kasimpasa.
And his performances in the Super Lig last season reportedly caught Besiktas' eye.
Besiktas hope to discuss a loan deal for the Nigerian with Chelsea.