England's captain Ben Stokes is said to be "exhausted" but still "physically able" to deliver overs, according to team coach Jeetan Patel, despite he did not bowl on the day three of a critical Ashes Test.
Stokes utilized five other bowlers as Australia progressed to 271-4 in their follow-on, establishing a commanding lead of 356 runs at the venue.
The dynamic player had previously spent over five hours at the crease across two days to compile 83 runs in England's first innings.
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 required time off the field on the previous day after banging 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 really exhausted and he's taken a lot out of himself to reach this point in the match."
Considering his chequered injury history – Stokes has not been fully available in any of England's previous four series – any suggestion the Durham man might be carrying a problem attracts considerable scrutiny.
Eager to be in the heat of battle, 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 requiring a victory in Adelaide to keep their aspirations of winning back the Ashes alive, England had given up a first-innings deficit of 85 runs.
"All I know is he operates 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 tourists could have stayed within the contest by bowling out Australia for around 240 in their second knock and had slim hopes at certain scorelines, only for the home team to accelerate away through Travis Head's unbeaten 142.
Although England delivered 66 overs, Stokes did not use himself.
"He abstained from bowling but that's probably a different discussion with him," said former New Zealand international Patel.
"I'm not entirely sure. We all know he never performs at 80%. Maybe he thought he was a liability, so he didn't bowl."
The last time Stokes limited his 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 injury.
Stokes has a history of driving himself to its absolute limit, and it was suggested to Patel that the captain felt he might have risked injury if he pushed 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 day four, it would mean the destination of the Ashes has been decided 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 determined so swiftly.
If a primary objective is to extend this match into a final day, England will also have to achieve the greatest run-chase at the Adelaide Oval to keep the series alive.
"I still believe 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 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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