Shaun Edwards has set the Welsh side a target of restricting Australia to fewer than 18 points in order to stay in the three-match series by squaring things up in Melbourne's Etihad Stadium on Saturday.
The Wallabies scored three tries - as many as Wales had conceded in five games in their Grand Slam campaign - in their 27-19 win in the first Test in Brisbane and defence coach Edwards wants to cut back on the points his team conceded last weekend.
"It is difficult to keep a Tri Nations team to less than 20 points, but if we can keep them between 15-18 we will be in with a chance of winning the game," said Edwards.
He added: "We are playing against a Tri Nations team and in the professional era we have yet to beat a Tri Nations team away from home," said Edwards.
"So, if you look at the history of it, it is obviously a huge challenge, but we are just looking at the here and now and the things we have to change and improve on from last week.
"We are going to get up to the pace of the game a bit more. Sam Warburton will have a little bit more confidence under his belt having played his first game in 11 weeks and it should be a little bit cooler in Melbourne than it was in Brisbane."