Sinndar can become the first horse since Commander In Chief in 1993 to complete a Derby double at Epsom and the Curragh in the Budweiser-sponsored Classic on July 2.
And the Aga Khan's colt can prove himself the top middle-distance three-year-old in Europe by beating Holding Court, winner of the French equivalent - the Prix du Jockey Club.
The son of Grand Lodge was unbeaten in two races as a juvenile, ending with a head victory in the Group One National Stakes at the Curragh.
John Oxx's charge suffered his only defeat to date on his first start this season, failing by a head to give Grand Finale 7lb in a Listed event at Leopardstown in April.
He completed his preparation for Epsom in the Derrinstown Stud Derby Trial at the same course in May, battling to a head victory over Bach.
Sent off a well-fancied 7-1 chance for the Vodafone Derby, Sinndar was always near the head of affairs in a strongly-run race.
Tackling Sakhee in the final furlong, he drew ahead for a length victory with third-placed Beat Hollow a further five lengths adrift.
Sinndar set himself up to win a US1 million bonus should he win the Irish Derby, as long as there are eight runners in the race.
Oxx and the Aga Khan have four entries in the race along with Sinndar, Ezbek, Korasoun, Raypour and Takali.
And the duo look set to be triple-handed, Oxx explaining earlier this week: 'I will probably run two others in addition to Sinndar. I don't know which ones yet. I have to discuss this with the Aga Khan.
'Sinndar came out of Epsom well and is in good shape. He has cantered from last Tuesday onwards and we are very happy with him.'
The presence of two stable companions should ensure the strong pace that suited Sinndar so well at Epsom is repeated.
And they may also spoil the chances of Holding Court, who is also bidding for the 1m bonus.
Trained by Brian Meehan as a two-year-old, the Hernando colt is unbeaten in three starts this season for Michael Jarvis.
The colt made all to win a rated stakes at Haydock in April and adopted the same tactics when stepped up in class in the Group Three Prix la Force at Longchamp the following month, beating Bonnet Rouge by three lengths.
Connections decided to supplement the colt for the French Derby at Chantilly rather than for Epsom and the decision paid spectacular dividends.
In front from the off, the three-year-old turned the race into a procession, passing the post six lengths clear of Lord Flasheart.
The Irish Derby was immediately named as the next target for the colt, Jarvis saying: 'I suppose we'll have to supplement him for the Irish Derby now. There's a 1m bonus up for grabs and you can't ignore that.'
It will cost IR#85,000 to add Holding Court to the field, and he may not even make it if the going is firm.
Hopefully conditions will allow him and Sinndar to meet and determine the leading middle-distance colt of this generation.
However, Holding Court is unlikely to have things his own way.
The ease of his victory at Chantilly was unexpected and he is unlikely to be allowed to set his own pace at the head of the field, especially with two of Sinndar's stablemates in attendance.
And with a strong gallop in prospect, Johnny Murtagh should be able to employ the same tactics as he did at Epsom aboard Sinndar, sitting just off a strong pace and pouncing at the distance.
Although the placed horses at Epsom, Sakhee, Beat Hollow and Best Of The Bests, are set to bypass the Curragh there could be a major threat to the two Derby winners in King's Best.
The Sagitta 2000 Guineas winner was an 11th-hour withdrawal from the premier Classic because of a muscle complaint but is now back in work and could return at the Curragh.
His stamina has to be taken on trust but he would have to be respected especially as his trainer Sir Michael Stoute has won the race three times and his jockey Pat Eddery - who would replace the injured Kieren Fallon - four times.
Sinndar's Leopardstown conqueror Grand Finale is a possible for the race but is 7lb worse off here and will not have the benefit of superior fitness.
If something is to challenge the two principals it could be Glyndebourne, a three-and-a-half length winner from Right Wing in the Gallinule Stakes at the Curragh last time.
The colt is obviously on the upgrade but does not appear to be one of trainer Aidan O'Brien's leading lights.
The Aga Khan's three previous Derby winners Shergar, Shahrastani and Kahyasi all went on to score at the Curragh.
Sinndar can become the fourth. -PA
