DUBAI - Allrounder Mitchell Marsh will miss Australia's one-off Twenty20 against Pakistan due to a hamstring injury he picked up while playing for Perth Scorchers in the Champions League T20. The extent of the injury is not yet known, but it is likely to rule him out of the three-match ODI series that follows as well, Australia physio Alex Kountouris said.

"He's not playing the T20 and he's unlikely to be okay for the one-dayers," Kountouris said. "The timelines are just too tight and we're probably not going to have a crack at it I don't think. He's moving around okay and seems okay, but we'll wait and see for the Test matches how he progresses. There's certainly enough time for the Test matches."

Marsh had undergone surgery on the same hamstring - on his left leg - two years ago. According to Cricket Australia, he had "felt a pinch" in his hamstring while captaining Scorchers against Lahore Lions on Tuesday and went off the field for an extended period, but had later come out to bat, bailing the team out from a tight corner with 63 not out off 38. Then, the injury had apparently worsened on the flight to over to Dubai.

Scans revealed that he had possibly torn scar tissue from the previous injury, but Cricket Australia is seeking the opinion of specialists, including the surgeon who had operated on him two years ago. "Trying to decipher what's new, what's old, what's abnormal, what's normal, is a bit hard," Kountouris said. "So we're getting some opinions from back home from the guy who did the surgery, just to double-check with what we're doing. The consensus is that he's only torn the scar tissue but we're still looking into it. If that's the only thing that's happened it's going to be a sort of mild hamstring strain. It might get better really quickly or it might get better very slowly. That's what we don't know because of the unique nature of the injury."

The two-Test series begins on October 22, and should Marsh play, it will be his debut in the long format - that had seemed likely to happen, with coach Darren Lehmann having said an allrounder will be key in the Tests and Shane Watson missing out on the tour due to a calf injury.