He has also suggested that Ryan Moore might partner Sir Dragonet
in the William Hill St Leger at Doncaster on Saturday week, rather than travel to Leopardstown to ride either Japan or Magical in the Qipco Irish Champion Stakes the same day.
O'Brien has several engaged in the St Leger, led by by general second favourite Sir Dragonet
. He has the top two in the market, Japan and Magical, in the Irish Champion Stakes.
CURRAGH: 4.40 Edward Hopper, 5.10 Royal County Down, 5.45 Brunelle, 6.15 Falcon Eight, 6.45 Sir Dragonet
, 7.15 Hazakiyra, 7.50 Little Camacho, 8.20 Silverkode.
Yenillik made his belated debut at this venue in late April and, after a tardy start, never threatened, finishing ninth behind the high-class Sir Dragonet
and a couple of other subsequent winners.
The colt looked a viable Derby contender when second to Sir Dragonet
in the Chester Vase only to be sacrificed as a pacemaker in the Blue Riband at Epsom.
A full brother to the 2013 Derby winner Ruler Of The World, the son of Galileo was second to Sir Dragonet
in the Chester Vase before finishing eighth at Epsom.
He has come up short in a couple of Derby trials at Epsom and Chester this spring - most recently finishing sixth in the Chester Vase behind Sir Dragonet
- but this mile and a half contest represents a significant drop in class.
The favourite for example, Sir Dragonet
, wasn't even thought off as a top prospect by the Aidan O'Brien yard - apparently he shows very little at home - until he won both his starts to date in the style of a good'un, his eight-length victory in the Chester Vase looking visually stunning.But it's hard to have confidence about a twice-raced horse at just 5/2, whose latest victory was on very testing ground in a small-field race at Chester.
Broome (fourth), Sir Dragonet
(fifth) and Circus Maximus (sixth) added to the O'Brien domination from his seven runners.
Eighteen years on from his first triumph with Galileo, O'Brien saddled seven of the 13 runners, with the previously unbeaten Sir Dragonet
heading the market at 11-4 after being supplemented earlier in the week.
Entering the final furlong of a sun-baked Epsom, 11-4 favourite Sir Dragonet
and 2,000 Guineas fourth - saddled by 86-year-old Kevin Prendergast - looked destined to fight out the finish.
The trailblazing Sovereign quickly faded turning for home but the race really began in earnest when Madhmoon (10/1) and 11/4 jolly Sir Dragonet
stormed to the front two out.