I still have no clue. At least he's not worse since leaving AZ. He has moments you think wow when he's part of a clockwork attack like against Heerenveen: "Bij de 0-1, een aanval over meer dan dertig schijven die werd afgerond door de jarige Guus Til, gaf Kökcü het passje dat het verschil maakte." " At the 0-1, an attack over more than thirty stations that was completed by the year-old Guus Til, Kökcü gave the pass that made the difference. " Anyway, the high press system Slot uses fits him well. He has no problem bringing the physical labour for that demanding job in the midfield.