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On his final appearance, Doyoun ran over ten furlongs in the Champion Stakes at Newmarket in October, and finished third to the filly Indian Skimmer, beaten seven lengths.
Guillot's greatest successes came in 1994 when he won the Grand Critérium at Longchamp on Goldmark and, just two weeks later, the Champion Stakes at Newmarket, riding Dernier Empereur.
The partnership also had successes with Alamshar, who won the Irish Derby and the King George VI and Queen Elizabeth Stakes at Ascot; with Azamour, winner of the St. James's Palace Stakes, the Irish Champion Stakes, the Prince of Wales Stakes and the King George VI and Queen Elizabeth Stakes in 2004 and 2005; and with Kastoria, whose 2006 season included a win in the Irish St. Leger.