Paceman Gus Atkinson Adds to the English team's Fitness Problems.
'Significant concern' for England as Atkinson goes off suffering a hamstring problem.
The pace bowler further complicated the injury concerns plaguing England upon exiting the playing area early on day two of the fourth Ashes Test versus the Australians.
Atkinson experienced discomfort in his left leg immediately following a delivery in his spell during the morning session.
The touring camp stated the 27-year-old reported "discomfort" and was to take time away from the action to undergo evaluation "during the day".
The final Test in this Ashes battle at the SCG gets underway at the end of the week.
The visitors have already lost strike bowlers Mark Wood to a knee injury and another paceman to a side strain on the current trip.
Matthew Fisher was added to the party as injury reinforcement.
The seamer had a tough time early in the series, taking just three wickets.
He was left out from the previous Test, then recalled for the Melbourne Test in the playing XI.
The county bowler showed better form in Melbourne, claiming a couple of wickets in Australia's first innings, before adding 28 with the bat among just a trio of English batsmen to get into double digits.
Post a single over in Australia's second innings, he came back for the second day's play and had nightwatchman Scott Boland caught behind.
However, at the end of that over, he bowled a change of pace to Travis Head and immediately felt at his leg.
Gus Atkinson was brought back for the Boxing Day Test following his omission of the third.
