Clarke said scans yesterday returned ``good news'' by revealing just a slight strain to his right hamstring.

``I have a grade one hamstring strain so will be out of Friday's game,'' Clarke posted on Twitter.

Australia will be forced to name a replacement captain for the fixture against Sri Lanka at the SCG.

National selectors met yesterday to pick another captain and the rest of the squad for the next block of one-day games.

The squad will be released today and selectors could turn to ex-skipper Ricky Ponting as Clarke's temporary replacement.

Regular vice-captain Shane Watson only returned to grade ranks last weekend from a six-week absence with a calf injury.

While Clarke hoped to return for Sunday's one-dayer against India in Brisbane, team physiotherapist Alex Kountouris was non-commital.

``(He) sustained a low grade right hamstring strain,'' Kountouris said in a statement.

``I will assess him later this week and decide on his availability for the game in Brisbane on Sunday.''

Selectors faced several tough decisions when choosing their next one-day squad, with Clarke's injury and wicketkeeper Brad Haddin's future key discussion points.

Haddin missed Australia's initial three one-dayers, with selectors saying he was rested as Matthew Wade took his spot.

Australia's batting line-up also faces scrutiny with newcomer Peter Forrest making 66 on debut in Sunday's loss to India to bolster his selection chances.

``I know the selectors are meeting today so I'll be sitting by my phone tomorrow (Tuesday) hoping to get a call,'' Forrest said yesterday.