Seamer Gus Atkinson Adds to the English team's Fitness Problems.
'Serious blow' for the touring side after Atkinson goes off due to a hamstring issue.
The English seamer increased the fitness woes of the England squad after leaving the playing area during Saturday's play of the Boxing Day Test versus the Australians.
Atkinson felt a problem in his hamstring immediately following a delivery of the fourth over on Saturday.
Team management reported Atkinson had experienced "tightness" and required time away from the action to undergo evaluation "during the day".
The concluding match of the series beginning on 4 January gets underway this coming Sunday.
The visitors have already lost key quicks one seamer with a knee problem and Jofra Archer with an abdominal strain during this series.
Matthew Fisher was brought into the squad as cover for Wood.
Atkinson struggled during the first two matches, managing only a handful of scalps.
He was left out from the previous Test, before being recalled for the fourth Test in the playing XI.
Surrey's Atkinson improved at the MCG, claiming a couple of wickets during the host's first knock, then making 28 with the bat among just a trio of English batsmen to get into double digits.
Following a brief spell in Australia's second innings, he came back for the second day's play and had nightwatchman taken by the wicketkeeper.
However, on the final ball of the fifth over, he sent down a variation to the batsman and immediately felt at his leg.
The English bowler was brought back for the fourth Ashes Test after being left out the Adelaide game.
