Australia have not given up hope of a record-breaking win in the final Test against South Africa, according to Micky Arthur.
Centuries from the tourists' Hashim Amla and AB de Villiers mean Australia must score 632 at the WACA to take the match, the series and top spot in the Test rankings.
That is 214 more than the highest winning fourth-innings total in Tests, but South Africa did chase down 414 for the loss of just four wickets at the same ground in 2008.
Arthur was in charge of the South Africans then and is now charged with masterminding an Australian escape with two days remaining in Perth.
He said: "We bat for two days we win. All we can do now is bat session for session and we have got to believe we can do it or there is no point rocking up tomorrow.
"The wicket is good and it gets better here, it is not going to crack up and there is no uneven bounce. A couple of big partnerships and you never know what might happen."
Australia knocked 40 off the target before the close and de Villiers, who scored 169 of South Africa's second-innings 569, is wary of a shock result.
He said: "We are aware that if they we go the full length of the Test match they will come quite close. They won't be giving it away, we are aware of that and we are not arrogant in any way whatsoever. We have a lot of hard work ahead."