England will make a final decision over Nick Easter's Rugby World Cup future on Sunday, manager Martin Johnson has confirmed.
Easter missed the 41-10 victory over Georgia after suffering a lower back injury and he remains sidelined for tomorrow's Pool B clash with Romania.
Leicester number eight Thomas Waldrom has been flown out to Dunedin and is on stand-by to replace Easter if he fails to recover.
Johnson said Easter was "progressing" but a final call will have to be made on Sunday, when England travel to Auckland to begin preparations for their decisive showdown with Scotland.
"Nick's progressing. We'll see where we are after Saturday," said Johnson.
"Nick's not had this injury before, it's just one of those where we're hoping he's going to be good to go next week.
"All the signs are he will be. It looks good but these things are day to day. We've got to (make a decision) after the game.
"He'd be a loss. That's why we had guys in through the camp. Thomas was in learning what we do, so if the situation arises he can put himself in contention pretty quickly.
"I think Nick will be okay. He's desperate to get back and play but we'll see how it progresses over the next 48 hours."
James Haskell will start at number eight in Easter's absence, having also successfully deputised for Lewis Moody at openside in England's tournament-opening victory over Argentina.
Haskell's form means there is no guarantee Easter would come straight back into the team to play Scotland, even if he was fully fit.
"(Haskell) came in last week for us at short notice and he's done very well," Johnson said.
"He's keen to improve and when he's been in the team, he's often covering multiple positions depending on who we have on the bench.
"At times he's covered all three, so he has to know all those roles and he's done a good job of it - he's playing well and he's a useful player to have with his utility."
England are still to replace injured prop Andrew Sheridan in their squad, with Johnson preferring to continue with a 29-man squad and keep his options open.