Fast bowler Gus Atkinson Adds to the English team's Fitness Worries.
'Serious blow' for the English camp as Atkinson is forced off with a hamstring injury.
The pace bowler further complicated the fitness woes of the England squad when he left the field during Saturday's play of the Boxing Day Test in the Ashes series.
Atkinson pulled up with his left leg post-delivery of the fourth over during the morning session.
The England team reported Atkinson felt some "soreness" and was to take time off the field to undergo evaluation "in the coming hours".
The final Test in this Ashes battle at the SCG begins at the end of the week.
England have already lost strike bowlers one seamer due to knee trouble and another paceman with an abdominal strain on this Ashes tour.
Matthew Fisher was added to the party as cover for Wood.
The seamer had a tough time in the opening two Tests, claiming a mere three wickets.
He was omitted of the third Test, then recalled for the Boxing Day match as Archer's replacement.
Atkinson improved at the MCG, claiming a couple of wickets in Australia's first innings, then making 28 while batting among just a trio of English batsmen to get into double digits.
Following a brief spell at the end of day one, he resumed on Saturday morning and dismissed the nightwatchman Scott Boland caught behind.
However, towards the conclusion of his spell, he bowled a change of pace to Travis Head and promptly felt for his hamstring.
Atkinson was brought back for the Melbourne match after being left out the Adelaide game.
