Fast bowler Atkinson Adds to the English team's Fitness Concerns.
'Serious blow' for the English camp after Atkinson leaves the field suffering a hamstring problem.
The English seamer increased the fitness woes of the England squad when he left the ground during Saturday's play of the fourth Ashes Test against Australia.
The pace bowler felt a problem in his left leg after the final ball in his spell during the morning session.
The England team indicated Atkinson had experienced "tightness" and required time away from the action for further assessment "during the day".
The concluding match of the tour at the SCG starts at the end of the week.
The visitors have previously lost key quicks one seamer with a knee problem and another paceman to a side strain on this Ashes tour.
Matthew Fisher was brought into the squad as cover for Wood.
Atkinson struggled in the opening two Tests, taking just a handful of scalps.
He was dropped from the previous Test, before being recalled for the Melbourne Test in the playing XI.
Atkinson improved at the MCG, bagging two scalps in Australia's first innings, before adding 28 while batting as one of just three England players to get into double digits.
Following a brief spell late on the first day, he resumed for the second day's play and removed Scott Boland Scott Boland caught behind.
However, towards the conclusion 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 fourth Ashes Test after being left out the previous Test.
