Fast bowler Gus Atkinson Adds to England's Injury Worries.
'Significant concern' for the English camp as Atkinson goes off suffering a hamstring problem.
The English seamer increased England's injury problems when he left the playing area during Saturday's play of the Boxing Day Test against Australia.
The pace bowler felt a problem in his hamstring after the final ball in his spell at the MCG.
The England team reported the 27-year-old reported "discomfort" and would spend time off the field to undergo evaluation "during the day".
The final Test of the series in Sydney begins at the end of the week.
The English side has previously lost fast bowlers one seamer due to knee trouble and another paceman because of a side injury during this series.
A replacement bowler was added to the party as injury reinforcement.
His form was underwhelming early in the series, taking just a handful of scalps.
He was dropped of the third Test, before being recalled for the fourth Test in the playing XI.
Surrey's Atkinson improved at the MCG, taking two wickets during the host's first knock, then making 28 with the bat as one of just three teammates to reach double figures.
Following a brief spell in Australia's second innings, he resumed on Saturday morning and dismissed the nightwatchman edging to the keeper.
However, towards the conclusion of his spell, he sent down a change of pace to Travis Head and promptly felt for his hamstring.
Gus Atkinson was brought back for the fourth Ashes Test after being left out of the third.