The team skipper Ben Stokes is reportedly "exhausted" but still "fit and ready" to bowl, according to team coach Jeetan Patel, even though he did not bowl on the third day of a critical Ashes Test.
Stokes deployed a quintet of alternative bowlers as Australia progressed to 271-4 in their second innings, establishing a substantial advantage of 356 runs at the Adelaide Oval.
The versatile all-rounder had previously spent over five hours at the wicket across two days to compile 83 runs in England's initial batting effort.
Throughout his extended 198-ball innings, the 34-year-old was struck on the head 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 attempting a stop.
"He could be a little fatigued and just require some time to himself right now," stated Patel.
"From what I understand, he's pretty fit to bowl. I think he's just pretty knackered and he's taken a lot out of himself to get through this point in the game."
Given his complicated injury past – Stokes has not been fully available in any of England's last four series – any indication the star all-rounder might be nursing an issue 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 final opportunity to stay 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 deficit 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 tourists could have remained in the match by dismissing Australia for around 240 in their second knock and had faint chances at 53-2 and 149-4, only for the home team to accelerate away through Travis Head's not out 142.
Although England bowled 66 overs, Stokes did not use himself.
"He abstained from bowling but that's probably a different discussion with him," said ex-New Zealand player Patel.
"I'm not entirely sure. We all know he doesn't do anything at 80%. Maybe he thought he was a liability, so he didn't bowl."
The last time Stokes curtailed his own bowling was on the last day of the tied 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 reputation of driving himself to its absolute limit, and it was put to Patel that the captain felt he might have risked injury if he pushed himself any further in Adelaide.
England stand on the edge of another loss in Australia, once again probably facing defeat inside the initial three matches of the series.
If the tourists' loss is sealed on Saturday's fourth day, it would mean the outcome of the Ashes has been determined in 10 days – the first and second Tests were over in short periods respectively.
Not since 1921, when Australia needed only eight days of play to win in England, has the winner of an Ashes series been determined so swiftly.
If a first goal 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 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 high time we witnessed something special from us."
"After three matches, we've thrown some but taken a lot. It's time, now we're with our backs to the wall, to throw some haymakers."
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