They will have their conditions assessed, along with Steven Nzonzi and Benjani Mwaruwari, whose own hamstring problems have kept them sidelined in recent weeks.
Last week's hero: Pedersen (second right) scored twice in the win over Villa
Gael Givet, who was substituted at half-time against Villa due to illness, should be able to take part.
Team (from): Robinson, Nelsen, Samba, Salgado, Jones, Givet, Pedersen, Dunn, Emerton, EH Diouf, MB Diouf, Kalinic, Roberts, Chimbonda, Hoilett, Linganzi, Goulon, Bunn, Hanley.
CLICK HERE FOR THE WEEKEND TEAM NEWS IN THE BARCLAYS PREMIER LEAGUE Explore more:People: Steven Nzonzi