Chantilly offers its riposte to Epsom's Derby jamboree on Sunday as the 183rd edition of the G1 Qatar Prix du Jockey Club welcomes France's new star of the middle-distance division, Big Rock (Fr) (Rock Of Gibraltar {Ire}). Initially slow to develop into the barnstorming character he has become, Yeguada Centurion's homebred would be an emotive winner for Christopher Head in the week that his beloved grandmother Ghislaine passed away. Introduced this year by Head in this track's Prix du Chene des Trois Freres handicap on the Polytrack in February, Big...