Australia captain Pat Cummins insists he will be doing everything he can to be fit for the first Ashes test in late November, saying it would be "devastating" to miss out on the Perth clash against England.

The 32-year-old pace bowler has been ruled out of upcoming white-ball series against New Zealand and India after scans revealed signs of lumbar bone stress in his back .

"(I'm) confident we'll do the rehab right and give it a good crack," Cummins told reporters in Brisbane. "This far out it's hard to know, but we're trying to make sure we're doing everything right to be right for Perth.

"It's a big Ashes series, it doesn't get much bigger, so you're willing to be aggressive and take a few risks to try to play as much of the tests as you can."

Cummins said he had been taking it

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