Seamer Gus Atkinson Compounds England's Fitness Worries.
'Major setback' for the touring side after Atkinson goes off due to a hamstring issue.
Gus Atkinson added to the injury concerns plaguing England when he left the field during Saturday's play of the Boxing Day Test in the Ashes series.
The right-arm seamer felt a problem in his left leg post-delivery that he bowled during the morning session.
The touring camp stated Atkinson reported "discomfort" and would spend time on the sidelines for further assessment "during the day".
The concluding match of the series beginning on 4 January begins on Sunday, 4 January.
The English side has previously lost fast bowlers Mark Wood with a knee problem and another paceman with an abdominal strain during this series.
Matthew Fisher was added to the party as cover for Wood.
The seamer had a tough time early in the series, claiming a mere a handful of scalps.
He was left out from the previous Test, then recalled for the fourth Test as Archer's replacement.
The county bowler showed better form in Melbourne, taking two wickets during the host's first knock, then making 28 while batting among just a trio of England players who passed ten runs.
Post a single over late on the first day, he returned for the second day's play and had nightwatchman edging to the keeper.
However, on the final ball of the fifth over, he sent down a variation to Travis Head and immediately felt his left hamstring.
The English bowler was recalled for the fourth Ashes Test following his omission the Adelaide game.
