Grella sustained a hamstring problem in last weekend's draw against Fulham and did not feature in the Carling Cup defeat at Aston Villa in midweek.
Hamstrung: Grella (left) is the latest Rovers player on the treatment table
Dunn has not played since the end of August while Andrews and Roberts have yet to feature this season because of injury.
Manager Sam Allardyce will make changes to the side he named for the Carling Cup, with Paul Robinson returning in goal.
Provisional squad: Robinson, Nelsen, Samba, Salgado, Jones, Givet, Olsson, Nzonzi, Pedersen, Emerton, EH Diouf, MB Diouf, Kalinic, Benjani, Bunn, Chimbonda, Hoilett, Linganzi.
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