Seamer Atkinson Compounds the English team's Fitness Problems.
'Significant concern' for England as Atkinson leaves the field with a hamstring injury.
The pace bowler further complicated the fitness woes of the England squad upon exiting the playing area early on day two of the fourth Ashes Test in the Ashes series.
The pace bowler felt a problem in his left hamstring after the final ball that he bowled on Saturday.
The England team stated Atkinson felt some "soreness" and would spend time on the sidelines for further assessment "in the coming hours".
The series decider of the series in Sydney begins this coming Sunday.
The English side has previously lost fast bowlers one seamer due to knee trouble and another paceman to a side strain during this series.
Matthew Fisher was added to the party as injury reinforcement.
Atkinson struggled during the first two matches, managing only a handful of scalps.
He was dropped for the Adelaide match, only to be brought back for the Boxing Day match in the playing XI.
Atkinson performed better in the fourth Test, claiming a couple of wickets in Australia's first innings, then making 28 with the bat as one of just three teammates to get into double digits.
Following a brief spell at the end of day one, he came back on Saturday morning and had nightwatchman Scott Boland caught behind.
However, on the final ball of the fifth over, he delivered a slower ball to Travis Head and suddenly grabbed his left hamstring.
Gus Atkinson was brought back for the Melbourne match having missed the Adelaide game.
