Hopes, Hogg in, Clark, Haddin out as Sri Lanka aim to top the table.

Sri Lanka's captain Mahela Jayawardene has thrown down the gauntlet for Friday's match in Perth after vowing to target perceived Australian weaknesses - and Ricky Ponting in particular - as they try to leap to the top of the table. A win for Sri Lanka would see them top the ladder, and drop the Aussies down to last. Ponting is yet to reach double figures this tournament.

Australia have made two changes to the team that lost to Inida: James Hopes and Brad Hogg are in, replacing Stuart Clark and Brad Haddin. Ponting said Australia were looking for extra variety.

Hopes, has recovered from a hamstring injury and offers allround options. With Australia opting for Hogg's spin over Clark's seam. Ponting recognised Clark was unlucky to miss out, having bowled well against India and returning figures of 1 for 26 last match.

"The wicket is very hard and very flat," Ponting told AAP, "so I think some change of pace with those two guys coming into the side will help us out. I think we will use the other part timers as well, because the quicks out there might just be the easiest bowlers to face."