Coolmore's G1 St Leger runner-up Illinois (Ire) (Galileo {Ire}--Danedrop {Ire}), by Danehill), winner of Royal Ascot's G2 Queen's Vase back in June, fired the opening salvo of ParisLongchamp's Arc weekend and delivered a battling performance to prevail in the 15-furlong G2 Qatar Prix Chaudenay. The 2-5 favourite, who had also placed in the G1 Criterium de Saint-Cloud and G1 Grand Prix de Paris, went straight to the lead and held sway until turning for home. Under pressure when headed briefly by Trafalgar Square (Fr) (Kendargent {Fr}) with 300 metres remaining,...