Besiktas president Fikret Orman insists he will not let Everton, Newcastle and Tottenham target Cenk Tosun leave on the cheap in January.
All three Premier League clubs are said to be watching the forward and some reports have even suggested that Newcastle are lining up a £13.2m New Year bid.
The 26-year-old caught the attention of a number of clubs with 20 goals in 33 outings in the Turkish top-flight last season.
Tosun has a little over 18 months left on his current deal so a number of sides believe he could represent good value for money.