Glen's Diamond and Royal Diamond, first and third in last month's Yorkshire Cup, feature among 10 possibles for the At The Races Curragh Cup at the County Kildare course on Sunday.
The former, trained by Richard Fahey, won for the first time since the Dee Stakes in May 2011 while Johnny Murtagh's Royal Diamond, last year's Irish St Leger hero, showed distinct signs of a return to form at York.
As well as Glen's Diamond there are two other prospective raiders in Mijhaar and Sir Graham Wade.
Aidan O'Brien may ask El Salvador to go to battle again after his sixth place in the Gold Cup at Royal Ascot last week. The Ballydoyle trainer could also call on Ernest Hemingway.
John Oxx has Call To Battle, Oliver Brady has Zafarqand and Dermot Weld enters on Voleuse De Coeurs.
The potential field is completed by Midnight Soprano, who landed the Group Three Noblesse Stakes at Cork last week.
Her trainer Paul Deegan has yet to decide whether she will take her chance or wait for the Lancashire Oaks at Haydock on Saturday week.
Meanwhile, O'Brien enters five of the 14 remaining fillies in the mix for the Oxigen Environmental Pretty Polly Stakes, which also takes place at the Curragh on Sunday.
The master of Ballydoyle has saddled two previous winners of the 10-furlong Group One in Peeping Fawn (2007) and Misty For Me (2011) and this year's quintet is led by 2012 Epsom Oaks heroine Was.
O'Brien has Ribblesdale Stakes runner-up Just Pretending, Magical Dream, Say and Moth engaged, although the latter has been declared to run at Naas tonight.
John Gosden's The Fugue was among the entries having run an excellent third on her seasonal reappearance in the Prince of Wales's Stakes at Royal Ascot.
But Curragh general manager Paul Hensey revealed on Twitter she would not be making the trip.
Among the leading contenders are Dermot Weld's Princess Highway, Tommy Stack's Alive Alive Oh and Kevin Prendergast's La Collina.