Seamer Atkinson Compounds the English team's Fitness Worries.
'Significant concern' for the touring side as Atkinson leaves the field with a hamstring injury.
Gus Atkinson increased the fitness woes of the England squad after leaving the field on the second morning in the Melbourne Test versus the Australians.
The pace bowler pulled up with his left hamstring post-delivery of the fourth over during the morning session.
The touring camp indicated the 27-year-old felt some "soreness" and required time off the field to undergo evaluation "over the next few hours".
The series decider of the series in Sydney begins at the end of the week.
The visitors have already lost key quicks Mark Wood to a knee injury and Jofra Archer to a side strain on this Ashes tour.
A replacement bowler was added to the party as cover for Wood.
The seamer had a tough time during the first two matches, managing only a handful of scalps.
He was omitted for the Adelaide match, before being recalled for the Boxing Day match to fill the void.
Surrey's Atkinson improved at the MCG, taking two wickets during the host's first knock, then making 28 while batting being one of only three teammates who passed ten runs.
After bowling one over late on the first day, he resumed the next day and had nightwatchman taken by the wicketkeeper.
Yet, on the final ball of the fifth over, he delivered a change of pace to the batsman and promptly felt for his hamstring.
Gus Atkinson returned to the side for the Boxing Day Test after being left out the previous Test.