Owen Farrell has given Stuart Lancaster an injury scare heading into England's RBS 6 Nations get-together.

The Saracens fly-half hobbled off due to a knee problem sustained in the first half of his club side's defeat to Clermont Auvergne on Sunday.

Saracens set up a European Champions Cup quarter-final meeting with Racing Metro despite their disappointing 18-6 loss at the Stade Marcel-Michelin on Sunday.

England head coach Lancaster would have noted that Farrell was replaced in the 18th minute after twisting his left knee in a collision with Clermont flanker Julien Bardy, and will now look to learn more.

Farrell is due to meet up with the rest of his England team-mates on Monday, and Saracens director of rugby Mark McCall said the fly-half would be assessed in the coming days before a decision is made on whether he can take part in the first Six Nations fixture against Wales, on Friday week.

''I wouldn't want to say right now. It's a new injury and we don't know the extent of it just yet,'' McCall said, according to the Daily Telegraph, when asked whether Farrell would be fit for the game in Cardiff.

''It's complicated with knee injuries, sometimes you can do that [walk off] and it's more serious, but we'll get him looked after and we'll know in the next few days.''

Although Farrell lost his place in the England team to George Ford last autumn, Lancaster still views the Saracens back as an important part of the squad. If Farrell is ruled out, either Danny Cipriani or Northampton's Stephen Myler will challenge Ford for a place in the starting XV.

Bath's England centre Kyle Eastmond injured his shoulder in the 20-15 win over Glasgow Warriors on Sunday, while Red Rose forwards Geoff Parling and Tom Wood were injured during Saturday's matches.

Eastmond appears likely to be fit for England duty.

Bath head coach Mike Ford said on Sunday: ''Kyle came off last week with a shoulder (knock), and he's just taken another knock.

''He says he is fine, and we don't think it is too bad. The doctor was pretty adamant that he had to come off, and it was the right thing to do.''