Seamer Gus Atkinson Adds to the English team's Fitness Concerns.
'Serious blow' for England as Atkinson leaves the field with a hamstring injury.
The pace bowler added to the injury concerns plaguing England after leaving the field on the second morning of the Boxing Day Test versus the Australians.
The pace bowler pulled up with his hamstring post-delivery that he bowled during the morning session.
The touring camp indicated the 27-year-old felt some "soreness" and was to take time on the sidelines in order to be assessed "in the coming hours".
The concluding match of the series in Sydney starts this coming Sunday.
The visitors have been without key quicks one seamer with a knee problem and another paceman because of a side injury on this Ashes tour.
Matthew Fisher was called up to provide backup.
The seamer had a tough time early in the series, taking just a handful of scalps.
He was dropped of the third Test, before being recalled for the fourth Test to fill the void.
Atkinson showed better form in Melbourne, claiming a couple of wickets during the host's first knock, and scoring 28 runs with the bat being one of only three English batsmen who passed ten runs.
Following a brief spell in Australia's second innings, he resumed on Saturday morning and had nightwatchman taken by the wicketkeeper.
Yet, at the end of the fifth over, he delivered a variation to the batsman and immediately felt his left hamstring.
Atkinson was brought back for the fourth Ashes Test after being left out of the third.
