Brad Haddin has said Australia have no intention of lowering their intensity going into ODIs four and five of their home series against Pakistan.

The hosts have already clinched the affair three-nil, with convincing wins in Brisbane, Sydney and Adelaide.

With star performers Shane Watson and Doug Bollinger rested for the remaining matches, wicketkeeper-batsman Haddin was prompt to dispel any suggestion that the Aussies would merely go through the motions in Perth's fourth and fifth one-dayers.

"We are trying to make the opposition feel as uncomfortable as we possibly can and win all the games we play," Haddin insisted, adding his praise for rookie pace Ryan Harris, whose five-wicket haul proved instrumental in the home team's 140-run thrashing of Mohammad Yousuf's men earlier in the week.

"He deserves his five-for. He has worked hard and he is a good guy and he deserves the success he got."

Harris is expected to maintain his spot in the starting XI for the weekend's double-header, with James Hopes or Mitchell Johnson - back after a three-ODI break - likely to replace Watson and Peter Siddle set to come in for Bollinger, subject to fitness.

"It's not going to be a week's injury. I thought if there's any doubt with him at all just give him Tuesday off and we'll just put him in cotton wool for a couple of days and hope he comes up and ready to play at the WACA in Perth," captain Ponting said of sidelined Siddle.

30-year-old Harris, who endured an unspectacular ODI debut against South Africa in early 2009, proved his mettle at international level when he removed brothers Kamran and Umar Akmal and the big-hitting Shahid Afridi en route to figures of five for 43 in Tuesday's series-winning result.

The beefy Queenslander hopes he will continue to make an impact on the limited-overs scene, with a more permanent status amongst Ponting's posse one of his goals.

"I come and go when I'm needed and hopefully I do my job," Harris concluded. "It's good to be able to come into a group that accepts you like you've been there a while. It's pretty easy to make that transition."

Meanwhile, Pakistan will have to go without the services of pace ace Mohammad Aamer again, as the teenage sensation is still nursing a groin injury.

The tourists' pace attack is a sorry state without Aamer around, with Umar Gul and Mohammad Asif fetching plenty of tap in Monday's heavy loss.

Regardless of Gul and Asif's recent dismal display, the team's brains trust are unlikely to give seamer Rao Iftikhar, with a lack match practice counting against the 29-year-old right-armer.