Fast bowler Gus Atkinson Adds to the English team's Injury Worries.
'Serious blow' for England after Atkinson leaves the field due to a hamstring issue.
The pace bowler added to the fitness woes of the England squad after leaving the ground early on day two of the Boxing Day Test in the Ashes series.
Atkinson felt a problem in his hamstring after the final ball that he bowled on Saturday.
Team management indicated the 27-year-old felt some "soreness" and was to take time away from the action in order to be assessed "during the day".
The series decider of the tour in Sydney gets underway on Sunday, 4 January.
The visitors have previously lost key quicks Mark Wood to a knee injury and another paceman to a side strain on the current trip.
Matthew Fisher was called up as injury reinforcement.
His form was underwhelming early in the series, claiming a mere three wickets.
He was omitted from the previous Test, then recalled for the Melbourne Test in the playing XI.
Surrey's Atkinson improved at the MCG, bagging two scalps in Australia's first innings, before adding 28 while batting being one of only three teammates to get into double digits.
Following a brief spell at the end of day one, he came back for the second day's play and dismissed the nightwatchman taken by the wicketkeeper.
Yet, towards the conclusion of the fifth over, he bowled a slower ball to Travis Head and immediately felt for his hamstring.
Atkinson was recalled for the Boxing Day Test following his omission the previous Test.
