Australia will today attempt to bat England out of the third Test in their bid to regain the Ashes at the WACA Ground.
Steve Smith led the way for Australia on day one yesterday with an unbeaten century that helped rescue his team after England had belied their insipid performances in the first two Tests.
The tourists exposed Australia's shaky top order before Smith (103 not out) and evergreen wicket-keeper Brad Haddin (55) combined for a century stand.
At stumps Australia were 6-326, with local hero Mitchell Johnson thrilling most of the 21,857-strong crowd by clouting 39 not out.
Bowling coach David Saker lamented the loss of control of England's attack after they had Australia on the ropes at 5-143.
"It's not the first time in this series we've let them off the hook," Saker said.
"We pride ourselves on being able to hold our lengths but that didn't happen.
"But you can't judge a game on one day and we remain very determined to win the match."
It was the highest total on the first day of an Ashes Test at the ground and just the ninth time in more than 40 years that any team had posted 300. Down 2-0 after two Tests and having to bowl first after Michael Clarke won his third toss of the series, England scythed through the first half of the innings with the assistance of some inept batting.
The future of mature-age bats- men Chris Rogers, Shane Watson and George Bailey will edge closer to the spotlight after their failures continued their mixed form this summer.
Each batsman has scored just one half century. Bailey's average of 24 is the best of the trio.
Australia would have been in dire trouble without the century stand between Smith and Haddin on what could prove the best batting surface of the summer.
England responded in cynical fashion to the flourishing partnership by slowing their over rate to the point that only 80 overs were bowled by the scheduled stumps time at 5.30pm.
Haddin scored 94, 53 and 118 in his contributions to the wins at the Gabba and Adelaide Oval but was required to produce sixth-wicket salvage missions in each match.
His 55 yesterday was cut from the same cloth.
Rogers started crisply but was soon the victim of a superb pick up and throw from James Anderson that took advantage of fatal hesitation between the openers.
Watson wafted hard outside off-stump in the fatal fashion of generations of visiting batsmen.
Clarke was the other prize wicket but he fell to his own impetuosity and Graeme Swann's classic off-break by clipping his first ball from the spinner to the mid-wicket catcher, Alastair Cook.
Warner sledged Michael Carberry's catching on the eve of the Test but gave his England opponent the last word by giving him a sitter at point.
And Bailey was off-balance when he tugged a Stuart Broad bumper to the sprawling Kevin Pietersen in the deep.