Besiktas are trying to end Dele Alli's season-long loan early and send him back to Everton, according to reports in Turkey.
But the Istanbul side could potentially be forced to keep him on their books for the agreed duration due to the problematic situation should he return to Goodison Park this month.
Alli joined the Blues from Tottenham 12 months ago, but after failing to make an impact he was allowed to leave on loan to Besiktas in August, receiving a hero's welcome on his arrival. He endeared himself to fans by scoring on his second appearance in a 3-2 victory over Ankaragucu.