Authorized remains the red-hot favourite for the Prix de l'Arc de Triomphe after delighting trainer Peter Chapple-Hyam in his final piece of preparatory work.
The Derby hero was today confirmed at the first forfeit stage for the big race along with 14 others, including chief market rivals Soldier Of Fortune and Zambezi Sun.
Chapple-Hyam's star will step up to 12 furlongs for the first time since his Epsom triumph, having subsequently tasted defeat in the aptly-named Coral-Eclipse before setting the record straight in the Juddmonte International at York.
And while Authorized looks sure to face a stern examination in Paris on Sunday, Chapple-Hyam is counting down the hours with the son of Montjeu continuing to please on the gallops.
Chapple-Hyam said: "He just powered up there. It was as good a piece of work as he did before the Juddmonte and Derby.
"Authorized is in superb form and just where I want him to be," the trainer told www.peterchapplehyam.com.
"He is absolutely spot-on. The weekend can't come quick enough."
Authorized tops Coral's betting at 5-4, while Aidan O'Brien's Soldier Of Fortune, winner of the Irish Derby in July and the Prix Niel last month, is considered his greatest threat at 3-1.
Zambezi Sun could finish only third when sent off favourite for the Niel and trades at 9-2, while runner-up Sagara is available at 16-1.
Soldier Of Fortune, the expected mount of Johnny Murtagh, was one of seven left in by O'Brien, who can also call on the services of Dylan Thomas (Kieren Fallon), Yeats, Acapulco, Yellowstone, Archipenko and Red Rock Canyon.
Coral's David Stevens said: "While the Longchamp ground is likely to determine which horse heads the Ballydoyle challenge, punters are happy to back Authorized safe in the knowledge that the going is unlikely to be a concern.
"Although there's no Deep Impact to affect this year's Arc betting, Frankie Dettori versus Kieren Fallon will ensure there's plenty of interest in Sunday's race."
Of the remaining horses still engaged, the Mick Channon-trained Youmzain takes the eye having finished second to Dylan Thomas in the King George VI And Queen Elizabeth Stakes earlier this year.
Dragon Dancer could also line up, along with Anton Chekhov, Saddex and Mandesha.
The last-named Princess Zahra Aga Khan-owned filly is likely to wear cheekpieces in the big race after pleasing connections when equipped with them in a crucial workout.
The four-year-old, trained by Alain de Royer-Dupre, was put through her paces by Christophe Soumillon in a gallop with two stable companions.
It was the first time Soumillon has partnered her in home work.
"She worked very well. Everything is set for Sunday, everything is fine," said Georges Rimaud, racing manager to the Princess.
"Christophe rode her this morning. She felt really well and is in good form. The trainer was very happy with her and she is ready to roll.
"It is likely she will wear the cheekpieces on Sunday."
Mandesha, winner of the Prix de l'Opera at last year's Arc meeting, is on offer at 12-1 with Coral as she goes in search of her fourth Group One victory.
Prix de l'Arc de Triomphe
Coral bet: 5-4 Authorized, 3-1 Soldier Of Fortune, 9-2 Zambezi Sun, 8-1 Dylan Thomas, 12-1 Mandesha, 16-1 Saddex, Sagara, 20-1 Yeats, 33-1 Youmzain, 80-1 Yellowstone, 100-1 Dragon Dancer, 150-1 Red Rock Canyon, 200-1 Acapulco, Anton Chekhov, Archipenko.