Fast bowler Atkinson Compounds England's Fitness Problems.
'Serious blow' for England as Atkinson leaves the field suffering a hamstring problem.
Gus Atkinson increased England's injury problems when he left the ground on the second morning in the Melbourne Test in the Ashes series.
The right-arm seamer experienced discomfort in his hamstring after the final ball in his spell on Saturday.
The England team reported the 27-year-old had experienced "tightness" and required time away from the action to undergo evaluation "over the next few hours".
The series decider in this Ashes battle at the SCG begins on Sunday, 4 January.
England have previously lost strike bowlers one seamer with a knee problem and Jofra Archer to a side 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, taking just a handful of scalps.
He was dropped for the Adelaide match, only to be brought back for the Boxing Day match to fill the void.
Atkinson improved at the MCG, taking two wickets in Australia's first innings, and scoring 28 runs with the bat as one of just three teammates to get into double digits.
After bowling one over in Australia's second innings, he came back for the second day's play and removed Scott Boland Scott Boland caught behind.
However, at the end of that over, he bowled a change of pace to Travis Head and immediately felt his left hamstring.
Atkinson was recalled for the fourth Ashes Test following his omission of the third.
