Sariska and Midday, first and second in the Epsom Oaks, are set to clash again in Sunday's Darley-sponsored Irish equivalent.
The pair, trained by Michael Bell and Henry Cecil respectively, are among 12 fillies entered in the Curragh Classic following their battle up the Epsom straight. Both have been supplemented at a cost of 50,000 euros.
Richard Hannon's The Miniver Rose finished fifth at Epsom, while Jim Bolger's Oh Goodness Me was seventh and they both try again. Aidan O'Brien has won the race for last three years and has Chirkova and Roman Empress to choose from.
John Oxx has star three-year-old colt Sea The Stars in his yard and he will be hoping either Beauty O'Gwaun or Roses For The Lady can further add to his Classic tally this term.
Grace O'Malley, Belle Chose, Destined For Fame and Rory Anna complete the possibles.
Midday is owned by Khalid Abdullah and his racing manager, Teddy Grimthorpe, played down the idea that the Classic is just between the Epsom first and second.
"There is no such thing as a two-horse race and there are plenty of others in the race," he said.
"We have got a head to find, but it's going to be very interesting. I spoke to (general manager) Paul Hensey at the Curragh this morning and they've had quite a bit of rain - it is yielding on the soft side at the moment.
"The forecast is probably good until Saturday and we don't know if there's going to be more (rain) or not. I would think by the sounds of it - it is going to be good or just on the easy side of good, which would be acceptable for us."