England face an anxious wait over the fitnes of their number eight Billy Vunipola ahead of their clash with Wales at Twickenham on March 9.
He limped off shortly before half-time at Twickenham at the weekend after injuring his ankle in a tackle by Devin Toner during England's 13-10 over Ireland.
Vunipola will undergo scans on Monday and England boss Stuart Lancaster admitted the player is "no more than 50-50" to be fit for the match with the defending champions.
Lancaster revealed that he will give the Saracens stalwart as much time to recover before deciding whether he can face the Welsh.
"People like Tom Johnson, Matt Kvesic; these guys have been training with us," revealed Lancaster.
"But first of all we want to give Billy the best possible chance because he's a very good player."
In other news, England blindside flank Tom Wood suffered cramp in the win over Ireland, but has recovered.