The Juddmonte Grand Prix de Paris winnerran down Planteur close to the finish to score by a head in Sunday's Qatar Prix Niel, a race that has been won by subsequent Arc victors Montjeu, Sinndar, Dalakhani, Hurricane Run and Rail Link since 1999.

Coral went shortest about the three-year-old giving trainer Jean-Claude Rouget his first Arc, making him the 5-2 favourite (from 9-2f), while William Hill and Victor Chandler cut him to 3-1 favourite from 5-1 and 4-1 respectively.

Bookies also clipped Planteur for Europe's richest race on October 3 with Coral going 5-1 (from 7), Paddy Power 11-2 (from 8), Victor Chandler 6-1 (from 8) and William Hill 8-1 (from 10).

William Hill spokeswomen Kate Miller said: "The signs all suggest that this year's Arc is tremendously open, but Sunday's trials are usually key to pinpointing the winner. We suspect that Bekhabad's performance in the Prix Niel could prove to be the predominant one."

John Gosden and William Buick's superb weekend was completed with victory for Duncan in the Qatar Prix Foy and with Gosden confirming the Arc is under consideration for the five-year-old, he was given quotes of 16-1 by Paddy Power and 20-1 by William Hill, Coral and Totesport. Stan James, meanwhile, gave the pair's St Leger winner Arctic Cosmos a price of 25-1 for the 2012 Champion Hurdle.

Sariska's illustrious career ended on Sunday with her second refusal to start in the Prix Vermeille but the winner Midday will have a chance to add to her Group 1 haul in the Breeders' Cup Filly & Mare Turf at Churchill Downs in November.

Ladbrokes, William Hill, Coral and Paddy Power make her just even money to retain her crown after her defeat of Plumania and Sarafina on Sunday.