The team skipper Ben Stokes is said to be "worn out" but still "fit and ready" to deliver overs, according to team coach Jeetan Patel, despite he abstained from bowling on the day three of a critical Ashes Test.
Stokes utilized five other bowlers as Australia moved to 271-4 in their follow-on, establishing a commanding lead of 356 runs at the venue.
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 extended 198-ball innings, the veteran cricketer was hit on the helmet by a fast bowler and experienced bouts of cramp. He also required time off the field on the previous day after banging his head on the ground while trying to field the ball.
"He could be a bit tired and just need a bit of 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 match."
Considering his chequered injury past – Stokes has not played a full part in any of England's last four series – any suggestion the star all-rounder might be carrying a problem draws significant attention.
Always keen 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 remain alive in the Ashes series.
At trailing 2-0 and needing to win in Adelaide to keep their hopes of winning back the Ashes alive, England had given up 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 tourists could have remained in the match by bowling out Australia for around 240 in their second knock and had slim hopes at 53-2 and 149-4, only for the hosts to pull 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 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 risk, 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 history of pushing his body to its absolute limit, and it was suggested to Patel that the captain felt he might have endangered himself if he exerted himself any further in Adelaide.
England are on the verge of another loss in Australia, once again likely to be beaten inside the initial three matches of the series.
If the visitors' defeat is completed on Saturday's fourth day, it would mean the destination of the Ashes has been determined in 10 days – the opening two matches were over in short periods respectively.
Not since 1921, when Australia needed only eight playing days to win in England, has the victor of an Ashes series been decided this quickly.
If a primary objective is to extend this match into a fifth day, England will also have to achieve the highest successful chase at the Adelaide Oval to keep the series ongoing.
"I still believe there's an opportunity for us," stated Patel. "It won't be easy, we're going to need something magical. I think it's high time we saw something special from us."
"After three matches, we've thrown some but taken a lot. It's time, now we're backed into a corner, to throw some haymakers."
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