Fast bowler Atkinson Exacerbates England's Injury Worries.
'Serious blow' for the touring side as Atkinson goes off due to a hamstring issue.
The pace bowler further complicated England's injury problems when he left the ground during Saturday's play of the Boxing Day Test versus the Australians.
The right-arm seamer pulled up with his left hamstring after the final ball that he bowled at the MCG.
The touring camp stated Atkinson reported "discomfort" and required time away from the action for further assessment "over the next few hours".
The final Test in this Ashes battle at the SCG begins at the end of the week.
The visitors have already lost strike bowlers Mark Wood to a knee injury and Jofra Archer to a side strain on the current trip.
A replacement bowler was called up to provide backup.
Atkinson struggled during the first two matches, managing only a handful of scalps.
He was dropped of the third Test, only to be brought back for the fourth Test in the playing XI.
Atkinson showed better form in Melbourne, taking two wickets during the host's first knock, before adding 28 while batting as one of just three England players who passed ten runs.
Post a single over late on the first day, he returned for the second day's play and removed Scott Boland Scott Boland caught behind.
Unfortunately, at the end of his spell, he delivered a variation to Travis Head and suddenly grabbed for his hamstring.
Gus Atkinson was brought back for the Boxing Day Test following his omission of the third.