Murphy replaces Lyon in squad, Cummins out of rest of Ashes series

Spinner Todd Murphy has been called into the Australia squad in place of the injured Nathan Lyon for this week's fourth Ashes Test, while captain Pat Cummins will skip the rest of the series as his back issue is managed.

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Lyon was ruled out for the rest of the series by a hamstring injury sustained as Australia beat England by 82 runs in the third Test in Adelaide on Sunday to clinch the series and retain the Ashes.

Steve Smith was also named in the squad despite missing the third Test after suffering a bout of vertigo and will captain the side in the absence of Cummins, as he did for the first two Tests of the series.