Arsenal midfielder Jack Wilshere has suffered a setback during his recovery from an ankle injury.
The England international, who has missed the entire campaign with the complaint, was expected to return next month.
However, Gunners boss Arsene Wenger has confirmed to reporters that the 20-year-old's progression has stalled.
Wenger refused to reveal the extent of the setback, insisting that he is waiting for an assessment for the club's medical staff.