Seamer Atkinson Adds to the English team's Fitness Problems.
'Significant concern' for England after Atkinson is forced off due to a hamstring issue.
The English seamer added to the fitness woes of the England squad after leaving the field during Saturday's play in the Melbourne Test against Australia.
The right-arm seamer experienced discomfort in his hamstring after the final ball that he bowled on Saturday.
The England team indicated the 27-year-old had experienced "tightness" and would spend time on the sidelines to undergo evaluation "during the day".
The series decider in this Ashes battle at the SCG gets underway at the end of the week.
The English side has previously lost fast bowlers one seamer due to knee trouble and another paceman because of a side injury during this series.
Matthew Fisher was added to the party to provide backup.
Atkinson struggled during the first two matches, managing only a handful of scalps.
He was dropped from the previous Test, then recalled for the Melbourne Test as Archer's replacement.
Atkinson performed better in the fourth Test, claiming a couple of wickets during the host's first knock, and scoring 28 runs with the bat as one of just three teammates who passed ten runs.
Post a single over at the end of day one, he came back for the second day's play and dismissed the nightwatchman Scott Boland caught behind.
However, on the final ball of that over, he delivered a change of pace to the batsman and promptly felt at his leg.
The English bowler was brought back for the Boxing Day Test following his omission the Adelaide game.
