England's captain Ben Stokes is said to be "worn out" but still "physically able" to deliver overs, according to assistant coach Jeetan Patel, even though he abstained from bowling on the third day of a critical Ashes Test.
Stokes deployed 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 earlier spent over five hours at the wicket over two days to score 83 runs in England's initial batting effort.
Throughout his marathon 198-ball stay, the veteran cricketer was struck on the head by a fast bowler and experienced bouts of cramp. 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 little fatigued 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 expended a great deal out of himself to reach this point in the match."
Given 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 draws considerable scrutiny.
Eager to be in the heat of battle, Stokes' absence from the attack on Friday was curious given it was England's last chance to remain alive in the Ashes series.
At trailing 2-0 and requiring a victory in Adelaide to keep their aspirations of regaining the urn intact, England had given up a first-innings deficit of 85 runs.
"All I know is he goes 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 probably where he's at."
The tourists could have remained in the match by dismissing Australia for approximately 240 in their second innings and had slim hopes at certain scorelines, only for the home team to pull away through Travis Head's not out 142.
Even though England bowled 66 overs, Stokes chose not to bowl.
"He didn't bowl but that's perhaps a separate conversation 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 risk, so he didn't bowl."
The last time Stokes curtailed his own bowling was on the final day of the tied fourth Test against India at Old Trafford in July.
He subsequently was absent for the fifth Test at The Oval with a shoulder problem.
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 exerted himself any further in Adelaide.
England are on the verge of yet another defeat in Australia, once again probably facing defeat inside the initial three matches of the series.
If the tourists' loss is completed on Saturday's fourth day, it would mean the destination of the Ashes has been determined in just ten days – the first and second Tests 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 prolong the game into a final 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 will be difficult, we're going to need something magical. I think it's high time we saw something special from us."
"After three matches, we've landed some blows but taken a lot. It's about time, now we're with our backs to the wall, to throw some haymakers."
Lena is a tech journalist with over a decade of experience covering consumer electronics and emerging technologies.