After moving to Turkey, Denis's career briskly declined. He failed to take advantage of the opportunities provided by the coaching staff, and eventually he sat tightly on the bench.

Last season, the Ukrainian goalkeeper held a lease in Malaga, which consisted of only five matches in all tournaments.

Edition Fanatik reports that Chenol Gunesh decided on the players who will soon be exhibited for the transfer. Among them, the Ukrainian Denis Boyko. The campaign was composed of Aras Ozbiliz and Veli Kavlak.

Earlier this same edition reported that Boyko is in talks with Shakhtar and Dynamo.

The contract of Denis with Besiktas works until the summer of 2020.