Sevilla are tracking Besiktas wing-back Ismail Koybasi.

The 20 year-old's form in the Champions League has attracted interest from major European clubs.

Sevilla are keen and his agent, Batur Altiparmak, said: "The boy has a four-year contract with Besiktas, but if Sevilla insists Köybasi is willing to talk."

Besiktas rate the youngster in the €10 million class.