A host of bookmakers have reported significant money for Gleneagles in the ante-post market on the Qipco 2000 Guineas.
Fourth on his racecourse debut, the Aidan O'Brien-trained colt finished a fine juvenile campaign when passing the post first in the Prix Jean-Luc Lagardere at Longchamp on Arc day, only to be demoted to third by the stewards for causing interference.
The son of Galileo had previously taken Group One honours in the Vincent O'Brien National Stakes at the Curragh.
Ladbrokes cut the Coolmore-owned runner to 4-1 from 6-1 overnight and 8-1 at the start of the week.
Spokesman David Williams said: "It's an interesting time of the year to be seeing support for a Ballydoyle Guineas contender. The price is in free-fall across the betting industry and Gleneagles has emerged as the clear Guineas favourite in next to no time this week."
Betfred also went 4-1, having initially been 5-1 from 6-1. The firm's Andrew Griffiths said: "Gleneagles has been solid for the Guineas all winter, but market support has really cranked up a notch over the last 24 hours.
"Punters clearly have an inkling he could be Ballydoyle's number one hope."
William Hill mirrored that move, with Jon Ivan-Duke saying: "There is a good strong flow of money for Gleneagles, with a number of four-figure bets on the horse. It's the strongest move so far for any horse in any of the Classic markets."
Coral are 9-2 from 6-1. David Stevens said: "We've seen sustained support for Gleneagles for the Qipco 2000 Guineas in the last 48 hours, suggesting the son of Galileo has been giving off all the right signs at home, and at this early stage of the year he could well be the leading Ballydoyle hope for the Newmarket Classic."