Sans Frontieres, winner of the 2010 Irish St Leger, has been retired due to the recurrence of a tendon injury.
His St Leger victory made him one of the favourites for the 2010 Melbourne Cup but injury prevented him making the trip to Australia and he has not raced since.
The six-year-old entire was being prepared for a return to the track when he sustained his latest setback.
It is hoped a career at stud awaits the son of Galileo.
Owned by Sir Robert Ogden and trained by Jeremy Noseda, he was restricted to just nine starts.
His most important successes came in his last three outings when he took out the Princess of Wales’s Stakes at Newmarket and the Geoffrey Freer Stakes at Newbury before his finest hour in Ireland, almost exactly two years ago.
“We have unfortunately had to retire Sans Frontieres,” the owner’s racing manager, Barry Simpson said.
“We got him very near to a run and he has been in tremendous form recently and working very well, but sadly he has damaged his tendon again.
“He was 120-rated and never fulfilled his potential.
“It was only when he won three consecutive Group races that he started to show his ability and sadly we have not been able to capitalise on that.
“We have brought him back twice and got near to running both times, but sadly this morning he damaged his tendon again and therefore we have no other alternative but to retire him.”
