Fast bowler Atkinson Adds to England's Fitness Worries.
'Major setback' for the touring side as Atkinson leaves the field suffering a hamstring problem.
The pace bowler added to England's injury problems upon exiting the playing area during Saturday's play of the Boxing Day Test versus the Australians.
The pace bowler felt a problem in his left hamstring immediately following a delivery that he bowled at the MCG.
The England team reported Atkinson had experienced "tightness" and was to take time off the field to undergo evaluation "over the next few hours".
The series decider of the series in Sydney starts on Sunday, 4 January.
The English side has already lost strike bowlers one seamer due to knee trouble and another paceman with an abdominal strain during this series.
Matthew Fisher was called up to provide backup.
Atkinson struggled in the opening two Tests, taking just three wickets.
He was left out for the Adelaide match, then recalled for the fourth Test as Archer's replacement.
The county bowler performed better in the fourth Test, taking two wickets with the ball, and scoring 28 runs as a batsman among just a trio of teammates who passed ten runs.
Post a single over in Australia's second innings, he returned for the second day's play and removed Scott Boland Scott Boland caught behind.
Yet, on the final ball of his spell, he delivered a variation to the batsman and promptly felt at his leg.
Gus Atkinson was brought back for the Melbourne match after being left out the previous Test.
