O`Brien quartet in French Derby Aidan O`Brien is responsible for four of the 15 remaining entries in Sunday`s Prix du Jockey-Club (French Derby).The Ballydoyle trainer has left in Diaghilev, Black Sam Bellamy, Castle Gandolfo and Temple of Artemis.O`Brien has already saddled the winners of the English, French and Irish 2000 Guineas this season.Simeon was, as expected, supplemented at a cost of ?60,000.The Mark Johnston-trained colt, winner of the Group Three Heathorns Classic Trial on his latest start, will be the only British runner in the classic at Chantilly.Frankie Dettori, who won the race 10 years ago on Polytain, will partner the Jumeirah Racing-owned colt for the first time in the big race - Kevin Darley having previously ridden Simeon to all his five victories to date.Two of the leading domestic contenders - the unbeaten Prix Lupin winner Act One and the Prix Hocquart scorer Khalkevi - were also left in at the probables stage.The remaining acceptors are Martaline, Alvarinho,Polities, Without Connexion, Louveteau, Sulamani, Great Pretender and Le Fou.Mick Channon`s Aramram and Godolphin`s Imtiyaz, plus the O`Brien pair, Nostradamus and Creekview, are all acceptors in the Group One Prix Jean Prat.The Group Two Prix du Gros Chene over five furlongs on the same cards has seen John Dunlop`s Massarra and Gerard Butler`s Swiss Lake left in.
