James Vince says England must believe if they are to have any chance of batting through day five to save the third Test and stay in the Ashes series.
Australia need just six wickets to regain the urn on Monday, with England still 127 runs away from making the hosts bat again in Perth.
Further rain is forecast for day five and that may be England's best chance of salvaging a draw, but Vince, who was dismissed shortly after reaching his second half-century of the series by a stunning delivery from Mitchell Starc, is not giving up hope just yet with Dawid Malan and Jonny Bairstow still at the crease.
"We try to put the rain to the back of our minds," Vince said. "A couple of days ago today was supposed to be more of a washout than it wasn't. I haven't seen a huge amount of rain during the time I've been in Perth.
"The two guys at the crease spent a lot of time there in the first innings in slightly different conditions, but we've got to have belief that we can stay in the series and get over the line tomorrow.
"It's going to be tough. I'm sure there will be some good balls flying about out there but these two showed in the first innings that they can occupy the crease for a long time. Hopefully we can get off to a good start in the morning."
Alastair Cook's miserable series continued as he was dismissed caught and bowled for 14, having managed only seven in the first innings of his 150th test.
Captain Joe Root (14) was equally culpable, edging Nathan Lyon, but Vince is not concerned by the form of England's senior players.
"From my point of view, you look at those two guys and if they don't score runs you expect them to score runs in the next innings," he said.
"They've shown over the their careers that they don't often have long periods without scoring runs and for the other guys in the team like myself, you look at them and expect them to score runs.
"That's not going to happen for them all the time but they are both very mentally strong and capable. Fingers crossed next time they make a big contribution."
Meanwhile, Australia seamer Josh Hazlewood, who dismissed both of England's openers, is confident his side can wrap up the series with victory on day five.
"I think were in a pretty good position obviously," he said. "I think we would have loved one more [wicket] today but they've lost the wickets at the tail pretty quickly throughout the whole series."