England captain Dylan Hartley is expected to be available to face Ireland at Twickenham but doubt now hovers over the fitness of Elliot Daly.
Hartley could return for the final round of the Six Nations against the newly crowned champions after missing the 22-16 defeat in France because of a tight calf that developed in training last week.
Jamie George deputised at hooker in Hartley's absence but the Saracen failed to make an impact at the Stade de France so Hartley is poised to make an immediate comeback.
"Dylan ran this morning (Monday) but we need to get a medical report on him," head coach Eddie Jones said.
"I expect him to be available but we'll just have to wait and see. If he's fit then he'll be playing."
Daly's fitness hinges on a scan for a foot injury with the Wasps wing currently wearing a protective boot around his left leg.
The trip to Paris was Daly's first appearance of the 2018 Six Nations, having recovered from ankle and calf problems, and he acquitted himself well in difficult circumstances.
"The boot is just a precaution. He'll go for a scan today (Monday)," Jones said.
Defeat by Ireland would condemn England to their worst Six Nations performance since 2006 and they could finish as low as fifth in the table.
The latest world rankings, published on Monday, revealed that they have been replaced by Joe Schmidt's men in second place in the wake of successive defeats by Scotland and France.
Asked if his belief in what the team can achieve has been shaken, Jones replied: "No, not at all.
"Every good team goes through this period. It's actually an essential part of developing a great team.
"The learnings we'll get from this, albeit very painful, are absolutely crucial going forward because it's about how we respond.
"It's not as if we can't play rugby, we know we've got good players as they've played for the Lions and won games for England.
"When you get a loss it tests your mental resolve and that's the test we've got to face.
"Obviously we need to get over the disappointment of losing to France. We've reflected on the game and we did enough to win, but sometimes the result doesn't go your way."
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