Besiktas want to cut short the loan of Miralem Pjanic and send him back to Barcelona next month.
The midfielder joined the Turks in August on a season-long loan, but has struggled to make a positive impact.
Zurnal says such is Besiktas' frustration that there's consideration inside the board room to end the loan arrangement early.
There's now active discussion being held about sending Pjanic back to Barca next month.
For ther part, Barca are likely to be reluctant to accept ripping up the deal given their delicate financial situation.