Newcastle United midfielder Haris Vuckic has broken down while on-loan with Wigan Athletic.
Vuckic had to be taken off injured this weekend and left Port Vale's ground in a protective boot.
Vale beat Wigan 3-2 and after Latics boss Gary Caldwell said: “It looks like an ankle injury, how bad it is we're not sure yet."
Vuckic moved to Wigan a fortnight ago.