Paceman Atkinson Exacerbates the English team's Fitness Problems.
'Significant concern' for England after Atkinson leaves the field with a hamstring injury.
The English seamer further complicated England's injury problems after leaving the ground early on day two in the Melbourne Test versus the Australians.
Atkinson experienced discomfort in his left leg post-delivery in his spell at the MCG.
The touring camp indicated Atkinson felt some "soreness" and was to take time away from the action to undergo evaluation "over the next few hours".
The series decider in this Ashes battle in Sydney gets underway on Sunday, 4 January.
England have already lost key quicks Mark Wood to a knee injury and Jofra Archer because of a side injury on the current trip.
A replacement bowler was added to the party as cover for Wood.
Atkinson struggled early in the series, taking just three wickets.
He was dropped of the third Test, only to be brought back for the Melbourne Test to fill the void.
The county bowler showed better form in Melbourne, claiming a couple of wickets with the ball, and scoring 28 runs as a batsman being one of only three teammates who passed ten runs.
Following a brief spell in Australia's second innings, he returned for the second day's play and had nightwatchman Scott Boland caught behind.
However, on the final ball of his spell, he bowled a slower ball to the batsman and immediately felt his left hamstring.
Gus Atkinson was brought back for the Melbourne match following his omission the previous Test.
