The team skipper Ben Stokes is said to be "worn out" but still "fit and ready" to deliver overs, per assistant coach Jeetan Patel, even though he did not bowl on the day three of a critical Ashes Test.
Stokes deployed a quintet of alternative bowlers as Australia moved to 271-4 in their second innings, building a commanding lead 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 first innings.
Throughout his marathon 198-ball innings, the 34-year-old was struck on the head by a fast bowler and experienced muscle cramps. He also needed a period off the field on Friday after hitting his head on the turf while trying to field the ball.
"He could be a bit tired and just require some time to himself right now," commented Patel.
"Based on my knowledge, he's pretty fit 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."
Considering his complicated injury past – 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 thick of the action, Stokes' decision not to bowl on Friday was curious given it was England's final opportunity to stay in the Ashes series.
At 2-0 down and needing to win in Adelaide to keep their hopes of regaining the urn alive, England had given up a first-innings deficit 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 stayed within the match by bowling out Australia for approximately 240 in their second innings and had slim hopes at 53-2 and 149-4, only for the hosts to accelerate away through Travis Head's not out 142.
Even though England bowled 66 overs, Stokes did not use himself.
"He didn't bowl but that's probably a separate conversation with him," noted former New Zealand international Patel.
"I'm not entirely sure. 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 drawn fourth Test against India at Old Trafford in July.
He afterwards was absent for the fifth Test at The Oval with a shoulder problem.
Stokes has a history of driving himself past breaking point, and it was suggested to Patel that the captain felt he might have endangered himself if he pushed himself any further in Adelaide.
England are on the verge of another loss in Australia, once again probably facing defeat inside the first three Tests of the series.
If the visitors' defeat is completed on Saturday's fourth day, it would mean the outcome 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 winner of an Ashes series been decided this quickly.
If a first goal is to prolong the game into a fifth day, England will also have to pull off the greatest run-chase at the Adelaide Oval to keep the series ongoing.
"I remain convinced there's an chance for us," stated Patel. "It will be difficult, we're going to need something magical. I think it's about time we witnessed something special from us."
"Three games in, we've landed some blows but absorbed many. It's about time, now we're backed into a corner, to throw some haymakers."
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