Diouf is cup-tied as he played for Sunderland earlier in the competition while Mokoena is suspended.

Allardyce is likely to shake up his side and give some of his fringe players a chance in this fifth round tie.

Provisional squad: Robinson, Bunn, Simpson, Ooijer, Khizanishvili, Nelsen, Samba, Warnock, Givet, Olsson, Dunn, Villanueva, Grella, Tugay, Andrews, Pedersen, Treacy, Haworth, Santa Cruz, McCarthy, Roberts.