Michael Hussey admitted losing Michael Clarke late on the fourth day was a "kick in the guts" for Australia - but he's adamant the hosts will keep on fighting in their bid to save the second Ashes Test.
Vice-captain Clarke was dismissed for 80 by Kevin Pietersen as Australia closed in Adelaide on 238-4, meaning they still trail by 137 runs.
It appeared the right-hander might be given a repreive when umpire Tony Hill initially gave him not out following a loud bat-pad appeal.
However England successfully reviewed the decision as Pietersen claimed his fifth - and surely most important - Test scalp after being thrown the ball by skipper Andrew Strauss.
"It was a bit of a kick in the guts to lose that one in the last over, but we're still in there fighting," Hussey said.
"Sometimes when someone's having a great game, it's not a bad idea to give them a chance with the ball as well. Sometimes they can pull off something special - like he (Pietersen) did today."
Clarke later apologised publicly via his Twitter feed for not walking when he knew he was out.
Hussey feared for his team-mate as soon as he saw his body language once England had immediately called for a referral.
"By the time I'd turned around, they'd pretty much 'referred' it straight away - and I could tell in Michael's body language that he thought he was out," he added.
"He's pretty distraught at the moment.
"He played like the Michael Clarke we have loved watching play over the last few years, so it was great for him to play that way, it was just disappointing he couldn't play through to the end of the day."
At least Hussey did make it through to the close; the left-hander will resume on day five on 44 not out knowing he will have a lot of batting to do if Australia are to escape from the match with a draw.
However they may also get some help from the weather; the forecast is for showers and a possible thunderstorm during the afternoon on Tuesday.
"We've got a lot of hard work to do before we can think about that, but if we can draw the match England will it as a loss, so that's got to drive us on," he said.
"We've certainly been outplayed, no question, but if we can get away with 0-0 it will be a great result for us.
"But we've got a bit of hard work to do, maybe a bit of luck and hopefully some weather to help us along the way."