Reading will be without Hope Akpan for at least two weeks after the midfielder dislocated his shoulder playing for Nigeria.
The 23-year-old had to come off during the Super Eagles' Africa Cup of Nations qualifier against Congo.
Akpan confirmed the injury on his Twitter page: "Thank you for all the get well soon messages. Dislocated my shoulder in yesterday's game V Congo. Thank God it wasn't anything worse."
He has made 14 appearances for the Royals this season but won't play again until December at the earliest.