Sam Burgess could miss the remainder of England's Rugby League World Cup campaign with a knee injury.
Josh Hodgson admits England "need to iron out the little errors" following Friday's 18-4 Rugby League World Cup defeat to Australia.
Simon Zebo has yet to sign a pre-contract agreement with Racing 92, the French club's assistant coach Ronan O'Gara says.
Aaron Cairns will make his first start for Ulster in Saturday's Pro14 derby against Leinster at Kingspan Stadium.
Ulster may be without injured half-backs Christian Lealiifano and John Cooney, and prop Wiehhan Herbst, for Saturday's Pro14 derby against Leinster.