Six Nations: Owen Farrell is 50-50 for England v Italy
England fly-half Owen Farrell is rated as only 50-50 to be fit to play against Italy in the Six Nations next Sunday.
The Saracens player picked up a quad injury in the 23-13 win over France and is making "good progress."
But head coach Stuart Lancaster said: "In the next week he'll be running, but the problem will be kicking. If there's a doubt we won't risk it."
England currently sit top of the Six Nations table with a 100% record from their first three games.
Six Nations highlights: England 23-13 France
Lancaster also revealed that number eight Ben Morgan is not going to recover from his ankle injury in time to face Italy on 10 March.
But he may play against Wales six days later, when England will be challenging for their first Grand Slam since 2003 if they overcome the Italians.
Meanwhile, forwards Alex Corbisiero, Tom Croft, Calum Clark, Tom Johnson and centre Jonathan Joseph will not be fit for those last two Six Nations matches.
Farrell, 21, is the top points scorer in this year's Six Nations with 42.
Lancaster may turn to Leicester's Toby Flood to replace him if Farrell fails to recover in time for the Italy game.