The team skipper Ben Stokes is said to be "worn out" but still "physically able" to deliver overs, per assistant coach Jeetan Patel, despite he did not bowl on the third day of a critical Ashes Test.
Stokes deployed five other bowlers as the Australian side progressed to 271-4 in their follow-on, establishing a substantial advantage of 356 runs at the venue.
The versatile all-rounder had earlier spent over five hours at the wicket across two days to compile 83 runs in England's initial batting effort.
During his marathon 198-ball stay, the veteran cricketer was struck on the head by a fast bowler and experienced muscle cramps. He also required time off the field on Friday after hitting his head on the turf while attempting a stop.
"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 expended a great deal out of himself to reach this point in the match."
Considering his complicated injury history – Stokes has not played a full part in any of England's last four series – any indication the star all-rounder might be nursing an issue attracts considerable scrutiny.
Eager to be in the heat of battle, Stokes' absence from the attack on Friday was puzzling given it was England's final opportunity to remain alive in the Ashes series.
At 2-0 down and requiring a victory in Adelaide to keep their hopes of regaining the urn intact, England had conceded a first-innings lead of 85 runs.
"My understanding is he operates at 100%," remarked Patel. "If he thinks he can't do it at 100%, I don't think he's going to do it. That's likely where he's at."
The visiting side could have stayed within the contest by bowling out Australia for around 240 in their second knock and had faint chances at 53-2 and 149-4, only for the home team to pull away through Travis Head's unbeaten 142.
Even though England delivered 66 overs, Stokes chose not to bowl.
"He abstained from bowling but that's perhaps a different discussion with him," noted 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 last day of the tied fourth Test against India at Old Trafford in July.
He subsequently missed the fifth Test at The Oval with a shoulder problem.
Stokes has a history of pushing his body to its absolute limit, and it was suggested to Patel that the captain felt he might have risked injury if he exerted himself any further in Adelaide.
England are on the verge of another loss in Australia, once again probably facing defeat inside the initial three matches of the series.
If the tourists' loss is completed on day four, it would mean the destination of the Ashes has been decided in 10 days – the first and second Tests 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 winner of an Ashes series been decided this quickly.
If a primary objective is to prolong the game into a final day, England will also have to pull off the greatest run-chase at the Adelaide Oval to keep the series alive.
"I remain convinced there's an chance for us," said Patel. "It will be difficult, we're going to need something magical. I think it's high time we witnessed something magical from us."
"Three games in, we've landed some blows but taken a lot. It's about time, now we're backed into a corner, to fight back fiercely."
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