Seamer Atkinson Adds to the English team's Fitness Worries.
'Serious blow' for the touring side as Atkinson is forced off due to a hamstring issue.
The pace bowler added to England's injury problems upon exiting the ground during Saturday's play in the Melbourne Test against Australia.
The right-arm seamer pulled up with his hamstring post-delivery in his spell on Saturday.
Team management stated Atkinson had experienced "tightness" and required time away from the action to undergo evaluation "over the next few hours".
The series decider in this Ashes battle beginning on 4 January starts on Sunday, 4 January.
The English side has previously lost key quicks Mark Wood with a knee problem and Jofra Archer to a side strain on the current trip.
A replacement bowler was added to the party to provide backup.
His form was underwhelming during the first two matches, managing only a handful of scalps.
He was omitted of the third Test, only to be brought back for the fourth Test in the playing XI.
Atkinson improved at the MCG, bagging two scalps during the host's first knock, and scoring 28 runs with the bat among just a trio of teammates to reach double figures.
After bowling one over in Australia's second innings, he resumed for the second day's play and dismissed the nightwatchman edging to the keeper.
Yet, towards the conclusion of that over, he bowled a variation to Travis Head and suddenly grabbed his left hamstring.
Atkinson returned to the side for the fourth Ashes Test after being left out the previous Test.
