Gold Cup favourite Forgotten Rules starts off on the road to Royal Ascot in the Coolmore Vintage Crop Stakes at Navan.
Dermot Weld's unbeaten five-year-old may have began his career in a bumper, but he has quickly established himself as the most exciting Flat stayer around and oozed class when seeing off Biographer in the Long Distance Cup on Champions Day.
David Lanigan sends Biographer to take him on again but the chief threat comes in the shape of Answered, who outclassed Listed opposition on his comeback at Limerick, while Kingfisher was second in last year's Irish Derby.
Toscanini was a leading juvenile in 2014 and beat all bar subsequent Classic hero Gleneagles when last seen in the National Stakes. A repeat of that level of form on his reappearance would be enough to take the opening Brews Hill Race (2.15).
If he does lack for something in the way of fitness, the fillies Ainippe and Beach Belle, as well as Aidan O'Brien's impressive debut scorer Father Frost, are good enough to capitalise.
O'Brien's Stone Mountain didn't really fire when fancied on his racecourse introduction, but that Naas outing won't be lost on him and plenty will give him another chance in the Requinto EBF Maiden.
The Ballydoyle handler still has Jinsha Lake and Ivanovich Gorbatov in the Epsom Derby so they will need to show their credentials in the Pour Moi EBF Maiden and Excelebration Maiden respectively.
Mick Halford's reliable sprinter Russian Soul made a successful return from Dubai in a little race at Dundalk but faces an altogether different task in attempting to lump 10st 5lb to victory in the navanracecourse.ie Handicap.
In Princess Pearlita, Halford also has the top-weight for the Irish Stallion Farms EBF Fillies Handicap, although the ones to beat here could be the three-year-olds Curvy and Ringside Humour.