Christophe Soumillon has been booked to partner Detain in the Prix du Jockey Club at Chantilly on Sunday.

The Juddmonte-owned colt stayed on to finish sixth in the Poule d’Essai des Poulains and Thady Gosden, who trains in partnership with his father John, thinks a step up in trip will suit Detain, with the yard also running Bowmark, who will be ridden by Tom Marquand.

“The plan is to run both at the moment and both came out of their last races well,” said Thady Gosden.

Detain will be ridden by Christophe Soumillon
Detain will be ridden by Christophe Soumillon (Adam Davy/PA)

“Detain ran in the Poulains, he travelled back great from that, and Bowmark from York.

“Detain has been in good order, that was his first foreign trip but he took the experience very well. That was into Longchamp and this will be into Chantilly.

“He ran a nice race there, he was doing all his best work late on and shaped as if the step up to 10 furlongs would suit.”

Regarding the booking of Soumillon, Gosden added: “Christophe Soumillon is who he is. He’s a world-class jockey and he was available for the ride, so after discussions he kindly agreed to ride him.

Bowmark impressed at York
Bowmark impressed at York (Mike Egerton/PA)

“Tom Marquand will ride Bowmark with William Buick riding for Godolphin.

“I wouldn’t know which one I’d want to ride, I’d probably wait for the draw before I answered!

“It’s Bowmark’s first time travelling abroad so he’ll need to travel well whereas Detain has the experience of that, but hopefully they both continue to improve as the season goes on. Hopefully they are both impressive three-year-olds.

“It looks like being a big field and Chantilly has its quirks. The bigger the field, the more trouble we are likely to run into. Circumstantially a lot will have to go right and the draw is a major factor in that. Time will tell.”

Richard Hannon’s King Of Cities was supplemented for the Classic at a cost of €72,000 on Wednesday.

Speaking at Windsor on Monday, Hannon told Sky Sports Racing: “I always thought he was an extremely good horse. He’s by the best stallion in the world (Dubawi) and he has an extremely good pedigree.

“He doesn’t have anything to prove to me, it’s a big step up to go to the French Derby but he’s capable of anything.”

Andre Fabre has also supplemented the once-raced Sinileo, for the same connections who supplemented subsequent winner Sosie for the Prix d’Ispahan.