Australia left-arm spinner Ashton Agar is to return home and leave the Ashes tour after suffering a viral illness.
He has been unwell for the last week and will now be given time to rest and recuperate ahead of the Australian domestic season.
A surprise pick for the opening Test at Trent Bridge, Agar top scored for Australia with 98, also setting a new record score for a number 11 in Tests.
He was retained for the Lord's Test but having taken only two wickets in two matches was left out in favour of Nathan Lyon for the third and fourth Tests in Manchester and Chester-le-Street.
"Ashton has had a mild viral illness for the past week and needs some time to rest and recuperate," Cricket Australia (CA) team doctor Peter Brukner confirmed.
"It has been a long tour and while he has handled the pressure extremely well, we thought it would be a good idea for him to get home as soon possible to have a short break before preparing for the domestic season," he added.
To date, Agar, who plays for Western Australia, has played in just 13 first-class matches and two one-day games.
England lead the Ashes series 3-0 heading into the fifth and final match at The Oval which begins on 21st August.
© Cricket World 2013