SANS FRONTIERES has been retired after a recurrence of a tendon injury that had kept him off the course for the past two seasons. Trained by Jeremy Noseda, Sans Frontieres recorded the highest-profile Flat success for his owner Sir Robert Ogden, who had previously been noted as a major jumps owner, when landing the 2010 Irish St Leger at the Curragh on what turned out to be his final outing. Plans for a shot at the Melbourne Cup later that year were shelved after an illness prevented him from flying to Australia. Quoted on his website, Noseda said: "He was due to run at Newbury later this month and had been working very well, showing his customary dash. So it is a great shame that he has had a recurrence of a tendon injury. "Sans Frontieres was a very talented horse who, without question, would have won more Group 1s with a little more luck." Sans Frontieres was successful in four of his nine starts, including the Group 2 Princess Of Wales's Stakes and Group 3 Geoffrey Freer Stakes, and collected £251,502 in win and place prize-money. Connections hope to find the son of Galileo a place at stud. ------------------------------------------------------------------------------------------------------ A real shame and I remember being really impressed by this horse when I first got in to flat racing. Had him noted down for whenever he returned as one to follow as he gradually progressed back to his best.