Fast bowler Gus Atkinson Adds to England's Fitness Worries.
'Significant concern' for the touring side as Atkinson goes off due to a hamstring issue.
Gus Atkinson increased England's injury problems when he left the ground on the second morning of the Boxing Day Test in the Ashes series.
Atkinson felt a problem in his left hamstring post-delivery of the fourth over at the MCG.
The England team reported Atkinson reported "discomfort" and was to take time off the field for further assessment "over the next few hours".
The series decider in this Ashes battle in Sydney gets underway on Sunday, 4 January.
The English side has previously lost strike bowlers one seamer to a knee injury and another paceman with an abdominal strain on the current trip.
Matthew Fisher was brought into the squad as cover for Wood.
His form was underwhelming during the first two matches, taking just three wickets.
He was left out from the previous Test, only to be brought back for the Melbourne Test in the playing XI.
Surrey's Atkinson improved at the MCG, claiming a couple of wickets during the host's first knock, and scoring 28 runs with the bat as one of just three English batsmen who passed ten runs.
Post a single over at the end of day one, he returned on Saturday morning and dismissed the nightwatchman taken by the wicketkeeper.
However, on the final ball of the fifth over, he sent down a slower ball to the batsman and immediately felt for his hamstring.
Gus Atkinson was brought back for the Melbourne match following his omission the Adelaide game.
