Leeds United defender Pontus Jansson is an early doubt for his team's game with Reading FC.
The two teams clash in the Championship at Elland Road a week on Saturday (October 14).
The Swedish centre-back was injured after colliding with team-mate Kalvin Phillips during Leeds' 3-0 defeat by Sheffield Wednesday on Sunday.
Jansson has had to have scans on an arm injury following the incident.
He has been forced to miss his country's two upcoming World Cup qualifiers against Luxembourg and the Netherlands during this international break.
Should Jansson not make the game against Royals, it would leave Thomas Christiansen with a another defensive dilemma.
The Danish boss has seen his side's backline severely affected in the first two months of the season due to injuries and suspensions.
Jansson, Liam Cooper, Matthew Pennington, Vurnon Anita and Gaetano Berardi have all had time out.
Royals head into the game with injury concerns themselves as John Swift, Yann Kermorgant, Tennai Watson, Jordan Obita and Callum Harriott are all currently on the sidelines.