Manu Tuilagi has one last training session to prove his fitness for England's final Quilter International against Australia at Twickenham.
Tuilagi was expected to be ruled out of Saturday's climax to the autumn with the groin strain that has prevented him from playing this month, only to be retained in a 26-man squad that is making final preparations to face the Wallabies.
Eddie Jones names his team at lunchtime on Thursday and will assess Tuilagi's availability after this afternoon's make-or-break session.
"We need to find out where he's at and whether he's at 100 per cent," defence coach John Mitchell said.
"We expect him to train this afternoon, but like all players we intend to have restricted training activities based on their individual needs."
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England are "cautiously optimistic" that Manu Tuilagi will recover from his groin strain in time to face New Zealand at Twickenham on Saturday.
Tuilagi was withdrawn from the bench on the eve of the stirring 12-11 victory over South Africa after sustaining the injury during training at the squad's Portugal camp.
It is hoped the Leicester centre will take part in Monday evening's walk through and then resume full training on Tuesday.
Tuilagi was set to make his first international appearance since 2016 against the Springboks having recovered from serious groin, knee and hamstring injuries, only for his groin to tighten up.
"Manu is back and progressing well - we're cautiously optimistic he'll be available this week," England coach Eddie Jones said.
The outlook on Courtney Lawes' back injury is similar to Tuilagi with Jones hopeful he will be available for Saturday after being ruled out against South Africa.
Manu Tuilagi has been ruled out of England's clash with South Africa at Twickenham on Saturday by a minor groin strain.
Tuilagi sustained the injury during training on Thursday and has been withdrawn from the bench for the opening Quilter International.
Chris Ashton, who was initially left out of the matchday 23 announced by Eddie Jones, fills the vacancy on the bench.
"Manu's disappointed. He desperately wanted to play for England again," scrum head coach Neal Hatley said.
Tuilagi was poised to make his first Test appearance since 2016 as a second-half impact replacement following a wretched run of serious groin, hamstring and knee injuries.
It appears to be only a minor setback at this stage, but alarm bells will still be ringing given his injury history.
"It's just a small strain and he'll back training with us on Sunday," Hatley said.
"He'd put a good run in with his club, but he's buoyed by the fact that he'll be back in to prepare for New Zealand next weekend."
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Manu Tuilagi will miss England's tour to Australia next month with a hamstring problem, the Rugby Football Union has announced.
Tuilagi sustained the injury in Leicester's Aviva Premiership semi-final defeat at Saracens on Saturday and, following a scan, has been ruled out of the three-Test series against the Wallabies.
A replacement will be named after Sunday's pre-tour Test against Wales at Twickenham.
"It's bad luck for Manu so close to the tour, but it provides a great opportunity for someone else. We wish Manu all the best and a quick recovery," head coach Eddie Jones said.