Seamer Atkinson Compounds the English team's Injury Worries.
'Major setback' for the touring side as Atkinson is forced off due to a hamstring issue.
Gus Atkinson increased England's injury problems when he left the field on the second morning in the Melbourne Test in the Ashes series.
The right-arm seamer felt a problem in his left hamstring after the final ball of the fourth over at the MCG.
Team management stated the 27-year-old had experienced "tightness" and was to take time off the field for further assessment "in the coming hours".
The concluding match of the series in Sydney gets underway on Sunday, 4 January.
The visitors have previously lost key quicks one seamer with a knee problem and another paceman to a side strain on the current trip.
Matthew Fisher was brought into the squad to provide backup.
The seamer had a tough time early in the series, managing only three wickets.
He was omitted from the previous Test, before being recalled for the fourth Test as Archer's replacement.
The county bowler showed better form in Melbourne, bagging two scalps in Australia's first innings, then making 28 as a batsman as one of just three English batsmen to get into double digits.
Post a single over in Australia's second innings, he came back the next day and dismissed the nightwatchman edging to the keeper.
Unfortunately, towards the conclusion of his spell, he sent down a change of pace to the batsman and promptly felt for his hamstring.
Atkinson was brought back for the Melbourne match following his omission the Adelaide game.
