Spinner Ashton Agar is returning to Australia after contracting a "mild viral illness".
The news represents a hugely anti-climactic end to Agar's tour, which began in fairytale circumstances at Trent Bridge.
He was a shock selection for the first Ashes Test, with few in Australia and fewer still in England knowing much about the 19-year-old debutant.
But he was soon hitting the headlines by scoring 98, a world record for a No 11 in Test cricket and two short of becoming the first No 11 in history to score a Test century.
But his bowling was a disappointment and he was dropped after two Tests for the more experienced Nathan Lyon.
Team doctor Peter Brukner said: "Ashton has had a mild viral illness for the past week and needs some time to rest and recuperate.
"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."