Dr Fong clung on to beat Aware by a fast-diminishing nose in the Group Two Prix Eugene Ada at Maisons-Laffitte yesterday.
The Henry Cecil-trained colt then had to survive a lengthy stewards' inquiry before keeping the £30,000 first prize. Kieren Fallon launched his challenge two furlongs out, but his mount then drifted left into the eventual third, Quel Senor. Meanwhile, Sylvain Guillot produced his run on Pascal Bary's Aware which only just failed.
Killer Instinct is set for an earlier than expected debut at Ascot on Friday. Henry Cecil intends to run Prince Ahmed Salman's Zafonic colt, already 10 to 1 favourite for next year's 2,000 Guineas with Ladbrokes, in the EBF Maiden.