10/04/2012 3:45PM

Arc de Triomphe: Field now at 18 with late supplements

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With three horses supplemented to the race on Thursday and another horse removed from the race, Sunday’s Prix de l’Arc de Triomphe seems set to go with a field of 18, barring withdrawals at the final declaration stage on Friday morning.

Supplemented to the race were Saonois, who won the French Derby and Prix Niel in his last two starts; Bayrir, winner of the Secretariat at Arlington and second in the Niel; and the John Gosden-trained 3-year-old filly Great Heavens. Great Heavens, whose current four-race win streak was capped by a three-length score in the Group 1 Irish Oaks, is a full sister to Nathaniel, whose Arc plans were derailed by a minor illness this week. Taken out of Arc consideration was Reliable Man, with the France-based colt rerouted to the Canadian International at Woodbine on Oct. 14.

LIVE FROM LONGCHAMP: Watch full Saturday card | Watch full Sunday card

Ante-post betting markets, meanwhile, shifted on Thursday, with 3-year-old Camelot, announced as a definite Arc starter only on Wednesday, taking over favoritism at many betting houses from the Japanese 4-year-old Orfevre. Orfevre has long had the Arc as his major seasonal goal, and won his prep race for the main event in the Prix Foy last month at Longchamp. Nevertheless, the presence of Europe’s top 3-year-old, Camelot, and his partnership with popular rider Frankie Dettori has shifted the Arc betting.

Also receiving considerable betting play late this week is Sea Moon, who, it was determined Thursday, will have regular rider Ryan Moore as his pilot on Sunday. Moore has been out with an injury but was set to return to action Friday in England.

The Michael Stoute-trained Sea Moon also could benefit from course conditions, which are entirely different than in 2011, when Paris was hot and very dry, and Danedream won the Arc in course record time. The weather this October has been much wetter, with Longchamp’s clerk of the course saying Thursday that the going for Sunday’s races would be no better than soft, and, with more rain, could become very soft.