Leeds forward Tyler Roberts is to see a specialist to determine the full extent of the ankle injury he sustained in training.
Roberts, who signed from West Brom on the final day of the transfer window, is set for a spell on the sidelines after picking up the injury in training earlier this week.
Initial scans show the 19-year-old has a small crack on his shin which will need further assessment before new manager Paul Heckingbottom can plan for his return.
'This is disappointing news for all concerned, especially for Tyler,' Heckingbottom told the club's website.
'However, with the help of the experienced medical team at Thorp Arch, he will come back stronger than ever.
'We would love to have Tyler involved as soon as possible but, particularly with our younger players, the club has a duty of care to ensure we don't rush these situations because we expect Tyler to be an important player for us for years to come.'