Henderson has a back injury which kept him out of Preston´s defeat by Coventry while O´Brien injured his ankle in Hibernian´s victory against Inverness.
Meanwhile Under-21s manager Don Givens has called up Ipswich midfielder Owen Garvan for the European Championship qualifier against Portugal on Friday at Turner´s Cross.
Copyright (c) PA Sport 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: https://www.givemesport.com/writeforgms