Paceman Gus Atkinson Adds to the English team's Fitness Worries.
'Serious blow' for the English camp after Atkinson goes off suffering a hamstring problem.
The English seamer increased the fitness woes of the England squad when he left the playing area during Saturday's play of the Boxing Day Test in the Ashes series.
The pace bowler pulled up with his left leg after the final ball in his spell during the morning session.
The touring camp indicated the 27-year-old reported "discomfort" and was to take time off the field for further assessment "over the next few hours".
The series decider of the tour at the SCG starts this coming Sunday.
The visitors have already lost key quicks Mark Wood due to knee trouble and Jofra Archer with an abdominal strain during this series.
Matthew Fisher was called up as cover for Wood.
The seamer had a tough time during the first two matches, claiming a mere three wickets.
He was dropped of the third Test, before being recalled for the Melbourne Test as Archer's replacement.
Surrey's Atkinson showed better form in Melbourne, bagging two scalps during the host's first knock, and scoring 28 runs with the bat among just a trio of England players to reach double figures.
Post a single over late on the first day, he resumed for the second day's play and removed Scott Boland taken by the wicketkeeper.
However, on the final ball of that over, he delivered a change of pace to Travis Head and promptly felt for his hamstring.
Atkinson was recalled for the Melbourne match having missed the previous Test.
