Frankie Dettori has revealed he will ride for Aidan O'Brien in the rescheduled Qipco 2,000 Guineas (3.35) at Newmarket on Saturday.
There were 15 entries for the first Classic of the season and O'Brien, who has won the last two runnings, has put forward four runners, including Coventry Stakes winner Arizona, who is currently the 6-1 second favourite, and Wichita, who is as short as 10-1.
The field is headed by odds-on favourite Pinatubo, who was unbeaten in six starts for Charlie Appleby and Godolphin last season, including when beating Arizona in the Group 1 Dewhurst Stakes.
"Aidan has been in touch and I'll be riding for Ballydoyle in the 2,000 Guineas," said Dettori. "Ryan [Moore] obviously has first choice but I'm standing by for one of the others and I'm excited about it."
2,000 Guineas nominations: Al Suhail, Arizona, Cepheus, Juan Elcano, Kameko, Kenzai Warrior, Kinross, Military March, Mums Tipple, New World Tapestry, Persuasion, Pinatubo, Royal Dornoch, Starcat, Wichita
Dettori also confirmed he will partner the Mark Johnston-trained Raffle Prize in the Qipco 1,000 Guineas (3.35) the following day. She can be backed at 16-1.
The daughter of Slade Power won three of her six starts last season, including the Group 2 Queen Mary Stakes, and is among 17 entries.
Quadrilateral heads the market at 5-2 for trainer Roger Charlton. She enjoyed an unbeaten juvenile season, which included a narrow victory over Powerful Breeze in the Group 1 Fillies' Mile at Newmarket.
1,000 Guineas nominations: Boomer, Cloak Of Spirits, Final Song, Graceful Magic, Les Hogues, Love, Millisle, Peaceful, Quadrilateral, Raffle Prize, Romsey, Rose Of Kildare, Shimmering, So Wonderful, Summer Romance, Under The Stars, Yes Always