Frankie Dettori is set to partner Jazzi Top in the Investec Oaks at Epsom on Friday - instead of her shorter-priced stablemate Star Of Seville.
The Italian has the choice of either of the John Gosden-trained runners in the fillies' Classic, but holds a preference for Jazzi Top, who is unbeaten this season and looked good in the Pretty Polly at Newmarket last month.
Star Of Seville has also been in fine form, though, having defeated Together Forever by a head in the Musidora Stakes at York.
"I am leaning towards Jazzi Top," Dettori told the Daily Mail.
"Both fillies have stamina question marks. I watched the Musidora again and I think Star Of Seville's stamina just gave in a bit.
"The second (Together Forever) was receiving 4lb so, in theory, off level weights she should beat me at Epsom.
"Star of Seville is also a bit quirky and Jazzi Top's style of racing will suit Epsom.
"It was a juggling act and I have probably got it completely wrong but that is what I am doing."
