Melbourne, Dec. 23 -- Australia's Ashes campaign is set to continue without skipper Pat Cummins, who won't feature again in the series due to his ongoing back injury. The selectors and medical staff are being cautious, and there's also uncertainty about his availability for the T20 World Cup in February.

On Tuesday morning, it was confirmed, as Cummins had flagged after Adelaide, that he would sit out in the fourth Test against England. Australia Head coach Andrew McDonald said a few hours later that Cummins' series was over after one appearance, which helped secure the Ashes.

McDonald also said before the announcement of Australia's T20 World Cup squad that Cummins would undergo a check-in scan to assess his progress, and that his part...