Paceman Gus Atkinson Adds to the English team's Fitness Worries.
'Major setback' for the touring side after Atkinson is forced off with a hamstring injury.
Gus Atkinson added to the injury concerns plaguing England when he left the field during Saturday's play of the Boxing Day Test versus the Australians.
Atkinson pulled up with his left hamstring post-delivery in his spell during the morning session.
The touring camp reported the 27-year-old had experienced "tightness" and was to take time on the sidelines for further assessment "in the coming hours".
The series decider of the tour in Sydney gets underway at the end of the week.
England have previously lost key quicks Mark Wood with a knee problem and another paceman with an abdominal strain on the current trip.
A replacement bowler was called up to provide backup.
The seamer had a tough time during the first two matches, claiming a mere a handful of scalps.
He was omitted from the previous Test, only to be brought back for the Melbourne Test in the playing XI.
Surrey's Atkinson performed better in the fourth Test, bagging two scalps with the ball, and scoring 28 runs while batting being one of only three English batsmen to reach double figures.
After bowling one over late on the first day, he came back for the second day's play and removed Scott Boland Scott Boland caught behind.
However, towards the conclusion of that over, he sent down a variation to the batsman and suddenly grabbed his left hamstring.
The English bowler was brought back for the Melbourne match having missed of the third.
