Fast bowler Gus Atkinson Adds to the English team's Fitness Concerns.
'Serious blow' for the touring side as Atkinson is forced off with a hamstring injury.
The pace bowler further complicated England's injury problems when he left the playing area on the second morning of the Boxing Day Test versus the Australians.
The pace bowler experienced discomfort in his left leg post-delivery in his spell during the morning session.
Team management stated Atkinson had experienced "tightness" and was to take time on the sidelines to undergo evaluation "in the coming hours".
The final Test of the series at the SCG begins at the end of the week.
England have previously lost key quicks Mark Wood to a knee injury and Jofra Archer to a side strain during this series.
A replacement bowler was brought into the squad to provide backup.
The seamer had a tough time during the first two matches, managing only a handful of scalps.
He was dropped for the Adelaide match, before being recalled for the fourth Test as Archer's replacement.
Atkinson performed better in the fourth Test, claiming a couple of wickets with the ball, then making 28 as a batsman among just a trio of England players who passed ten runs.
Post a single over in Australia's second innings, he resumed on Saturday morning and dismissed the nightwatchman Scott Boland caught behind.
Yet, on the final ball of his spell, he bowled a slower ball to Travis Head and suddenly grabbed at his leg.
Atkinson was recalled for the Melbourne match following his omission the Adelaide game.
