Fast bowler Atkinson Exacerbates England's Fitness Concerns.
'Major setback' for England as Atkinson is forced off with a hamstring injury.
The English seamer further complicated England's injury problems after leaving the ground early on day two of the Boxing Day Test in the Ashes series.
The right-arm seamer experienced discomfort in his left hamstring after the final ball of the fourth over at the MCG.
The touring camp reported Atkinson reported "discomfort" and would spend time away from the action for further assessment "during the day".
The concluding match of the series in Sydney begins this coming Sunday.
England have been without key quicks Mark Wood to a knee injury and another paceman because of a side injury on this Ashes tour.
A replacement bowler was brought into the squad as cover for Wood.
Atkinson struggled in the opening two Tests, taking just three wickets.
He was left out of the third Test, then recalled for the fourth Test as Archer's replacement.
The county bowler showed better form in Melbourne, taking two wickets with the ball, before adding 28 as a batsman among just a trio of English batsmen to reach double figures.
Following a brief spell late on the first day, he resumed for the second day's play and had nightwatchman Scott Boland caught behind.
However, on the final ball of the fifth over, he sent down a change of pace to Travis Head and promptly felt at his leg.
Atkinson was brought back for the Melbourne match after being left out the previous Test.
