England's Stuart Broad will not bowl again in the third Ashes Test after injuring his right foot while batting.
Broad, 27, limped off after being dismissed lbw by Mitchell Johnson as England collapsed to 251 all out, and did not take the field as Australia reached 235-3 for a lead of 369.
He went to hospital for an X-ray and scans, which were analysed in the UK but revealed no fracture.
It was announced that Broad will bat in England's second innings if required.
He will be reviewed ahead of the fourth Test, which starts in Melbourne on 26 December.
Speaking before the scan results were announced, Broad said: "Something showed up on the X-ray that was inconclusive. Whether I bat depends on the match situation.
"It's part and parcel as a bowler to get injuries so it's frustrating to get hit batting.
"The details are all gobbledygook to me. All I want to know is the treatment so I can get it fixed."
Broad was hit on the top of his right foot by a yorker from Johnson to depart for five as England, who started day three on 180-4, were all out before lunch - 134-runs adrift of Australia's first innings total.
When England went out to field, the Nottinghamshire man took part in a fitness test in the nets, before going to hospital.
At the close, he appeared on crutches while wearing a protective boot and may now be a doubt for Melbourne.
"I was desperate to get out there and bowl, so I had to try it out in the nets," said Broad, who missed the final three Tests of the 2010-11 tour down under with a stomach strain.
"Normally, with a bruise, you'll get a bit of blood to it and get going - and the pain decreases. This actually increased quite a bit.
"Even if there's a small crack there and my symptoms aren't painful, I see no reason why I can't continue to play.
"I've got 10 days until Boxing Day. I see no reason why I can't get myself back in the frame for the Melbourne Test."
Broad has been England's leading wicket-taker with 14 victims and, in his absence, Australia piled on the runs on another desperate day for the tourists.
England, who have not made more then 312 in five innings, are now likely to have to bat for at least five sessions to save the game and avoid surrendering the Ashes by going 3-0 down in the five-match series.
"We've had numerous Tests over the past four years that we've managed to save when we had no right to," said Broad.
"There is a lot of belief in that changing room that we're certainly due a score; there's a lot of guys with great Test records in there, who haven't delivered in this series so far and are desperate to.
"We know, if you keep working hard on your game, things change for you - and we're hoping it does for us in the second innings."
But Australia batsman Chris Rogers, who made 54 on day three, said the deterioration of the Waca pitch could make batting "scary" for England.
"Today was amazing, as good as we have had in the Ashes so far," said the left-hander.
"If these cracks keep widening, it's going to be very hard to bat on - and a little bit scary.
"I think they know, particularly with our pace, that gets a bit worrying."