Saracens have confirmed that England international Billy Vunipola will be assessed following his latest injury setback.
Vunipola left the field in the sixth minute during the Heineken Champions Cup game against Racing 92 at Allianz Park last weekend following a broken arm.
A statement released by Saracens revealed that the 27-year-old will be assessed in due course of time to assess the extent of damage.
"He will see a consultant over the coming days to determine the full extent of the injury before undergoing rehabilitation," read the statement.
Following the game against Racing 92, Saracens director of rugby Mark McCall expressed hope that the injury might not be a serious one.
"They suspect a broken arm," said McCall.
"I hope it's not. I don't think it's been confirmed yet."
Vunipola has played 51 Tests for England since his debut in 2013 and has been a regular starter for the red rose team since England coach Eddie Jones took over.
With England set to begin their Six Nations campaign on 2nd February, a possible absence for Vunipola will open the opportunity for Harlequins back row Alex Dombrandt while Ben Earl, Ben Curry and Sam Simmonds could also be in contention.