Pale Mimosa fourth in Royal-Oak Dermot Weld's challenger Pale Mimosa came home in fourth as Tac De Boistron became only the third dual winner of the Prix Royal-Oak at Longchamp. William Buick was always in a good position on Dr Ronan Lambe's mare, but she was unable to quicken at the business end and stayed on stoutly to finish just behind the leaders. Sent off the 7-4 favourite on his preferred testing ground, Tac De Boistron was brought through with a powerful effort from his place in the middle of the field by Martin Harley and won by a length for the Marco Botti team. James Fanshawe's High Jinx made most of the running through the extended mile and seven furlongs and battled back under James Doyle to pinch the runner-up spot from Narrow Hill by a nose. The race recognised as the French St Leger has been a Group One open to older horses since 1979 and Amilynx and Westerner were the only previous performers to have won it twice. The result was all the more meritorious as Tac De Boistron was returning from a long lay-off, having raced just twice during the spring since his previous Royal-Oak triumph.