Seamer Atkinson Compounds England's Fitness Worries.
'Significant concern' for the English camp as Atkinson goes off due to a hamstring issue.
The English seamer added to England's injury problems after leaving the field early on day two of the fourth Ashes Test against Australia.
The right-arm seamer pulled up with his left leg after the final ball in his spell during the morning session.
Team management indicated Atkinson reported "discomfort" and required time on the sidelines in order to be assessed "in the coming hours".
The series decider of the tour in Sydney starts on Sunday, 4 January.
The English side has already lost strike bowlers one seamer due to knee trouble and Jofra Archer with an abdominal strain on the current trip.
Matthew Fisher was added to the party as injury reinforcement.
His form was underwhelming early in the series, claiming a mere a handful of scalps.
He was dropped from the previous Test, before being recalled for the Boxing Day match as Archer's replacement.
Atkinson improved at the MCG, taking two wickets with the ball, and scoring 28 runs with the bat as one of just three English batsmen who passed ten runs.
Following a brief spell late on the first day, he returned on Saturday morning and had nightwatchman taken by the wicketkeeper.
Yet, at the end of his spell, he delivered a change of pace to the batsman and suddenly grabbed for his hamstring.
Atkinson was recalled for the Melbourne match following his omission the Adelaide game.
