Paceman Atkinson Adds to the English team's Fitness Worries.
'Serious blow' for the English camp as Atkinson leaves the field due to a hamstring issue.
The English seamer further complicated the fitness woes of the England squad when he left the ground on the second morning of the Boxing Day Test in the Ashes series.
The right-arm seamer felt a problem in his hamstring post-delivery that he bowled during the morning session.
The touring camp reported the 27-year-old had experienced "tightness" and was to take time off the field in order to be assessed "over the next few hours".
The concluding match of the series at the SCG begins on Sunday, 4 January.
The visitors have previously lost key quicks one seamer due to knee trouble and another paceman because of a side injury on the current trip.
Matthew Fisher was brought into the squad to provide backup.
Atkinson struggled during the first two matches, taking just three wickets.
He was dropped for the Adelaide match, then recalled for the fourth Test in the playing XI.
The county bowler showed better form in Melbourne, bagging two scalps during the host's first knock, then making 28 while batting among just a trio of England players who passed ten runs.
After bowling one over late on the first day, he returned on Saturday morning and removed Scott Boland taken by the wicketkeeper.
Yet, on the final ball of his spell, he bowled a slower ball to the batsman and suddenly grabbed for his hamstring.
The English bowler was brought back for the Melbourne match after being left out the Adelaide game.
