The team skipper Ben Stokes is said to be "worn out" but still "physically able" to deliver overs, according to team coach Jeetan Patel, even though he did not bowl on the day three of a critical Ashes Test.
Stokes deployed five other bowlers as the Australian side moved to 271-4 in their follow-on, establishing a substantial advantage of 356 runs at the Adelaide Oval.
The dynamic player had previously battled for more than five hours at the crease over two days to compile 83 runs in England's initial batting effort.
Throughout his marathon 198-ball stay, the 34-year-old was hit on the helmet by a fast bowler and suffered muscle cramps. He also needed a period off the field on the previous day after hitting his head on the turf while trying to field the ball.
"He might be a bit tired and just require some time to himself right now," commented Patel.
"Based on my knowledge, he's quite ready to bowl. I think he's just really exhausted and he's taken a lot out of himself to reach this point in the game."
Given his chequered injury past – Stokes has not been fully available in any of England's last four series – any indication the Durham man might be carrying a problem attracts considerable scrutiny.
Always keen to be in the thick of the action, Stokes' absence from the attack on Friday was puzzling given it was England's last chance to stay in the Ashes series.
At trailing 2-0 and requiring a victory in Adelaide to keep their aspirations of winning back the Ashes alive, England had given up a first-innings lead of 85 runs.
"My understanding is he goes at 100%," said Patel. "If he thinks he can't do it at 100%, I don't think he's going to do it. That's probably where he's at."
The visiting side could have remained in the contest by bowling out Australia for approximately 240 in their second innings and had slim hopes at 53-2 and 149-4, only for the home team to accelerate away through Travis Head's unbeaten 142.
Although England delivered 66 overs, Stokes chose not to bowl.
"He didn't bowl but that's probably a different discussion with him," said ex-New Zealand player Patel.
"I don't actually know. We all know he never performs at 80%. Maybe he thought he was a risk, so he didn't bowl."
The most recent occasion Stokes curtailed his own bowling was on the final day of the tied fourth Test against India at Old Trafford in July.
He afterwards missed the fifth Test at The Oval with a shoulder injury.
Stokes has a reputation of pushing his body past breaking point, and it was suggested to Patel that the captain felt he might have endangered himself if he exerted himself any further in Adelaide.
England stand on the edge of another loss in Australia, once again probably facing defeat inside the first three Tests of the series.
If the tourists' loss is completed on Saturday's fourth day, it would mean the destination of the Ashes has been determined in just ten days – the opening two matches were over in two and four days respectively.
Not since 1921, when Australia needed only eight days of play to win in England, has the victor of an Ashes series been decided this quickly.
If a first goal is to extend this match into a fifth day, England will also have to achieve the greatest run-chase at the Adelaide Oval to keep the series ongoing.
"I still believe there's an opportunity for us," said Patel. "It will be difficult, we're going to need something extraordinary. I think it's about time we witnessed something special from us."
"Three games in, we've thrown some but absorbed many. It's time, now we're backed into a corner, to fight back fiercely."
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