Aidan O'Brien has two leading contenders as he goes in pursuit of yet another Qipco 1,000 Guineas triumph.
The Irish trainer, who has sent out five of the past six winners, relies on ante-post favourite Tenebrism, the mount of Ryan Moore and Frankie Dettori's runner Tuesday.
Dettori took last year's renewal on Mother Earth, while Winter and Hermosa were two of the recent shock winners from the O'Brien camp.