War Command has been given the go-ahead to compete in the Keeneland Phoenix Stakes at the Curragh.
The unbeaten colt won the Coventry Stakes at Royal Ascot by six lengths in June and is now set to step into Group One company.
Trainer Aidan O’Brien said: “War Command worked well this morning and will definitely take his place in the Phoenix.
“There’s also the possibility that we’ll run Fountain Of Youth and Wilshire Boulevard.”
Johnny Murtagh, meanwhile, will partner Ambiance in Sunday’s contest.
Murtagh, who has been in inspired form this summer, will receive the leg-up aboard Mick Channon’s colt for the first time as regular jockey Martin Harley is in action at Windsor on the same day.
Ted Voute, racing and bloodstock manager for his owner Prince Faisal, said: “Ambiance runs at the weekend and is in very good form. Martin is busy at Windsor so we’ve got Johnny Murtagh on board, which is never a bad thing – especially on home turf.”
Ambiance has been highly tried this summer, with a Listed win at Sandown and a solid fourth in the Norfolk Stakes at Royal Ascot the highlights.
He was last seen finishing a close-up third in the Molecomb Stakes at Glorious Goodwood.