Epsom awaits: how main contenders shape up for Derby and Oaks next month

Constitution River, ridden by Ryan Moore, wins the Dee Stakes at Chester in an emphatic style that boosted Derby hopes. Photograph: Steven Cargill/racingfotos.com/Shutterstock

Derby

1. Constitution River
Timeform rating: 124p. Odds: 6-1. Trainer: Aidan O’Brien. Pedigree: Wootton Bassett x Chuppy (Le Havre)
There’s no doubt about the “wow” performance of trials season: tactical speed, balance and a finishing kick, Constitution River had it all in a seven-length rout for the Dee Stakes at Chester, with a big timefigure to back up the form. But when was life ever that simple? An entry over a mile at Royal Ascot hints at stamina doubts, and current thinking seems to be leaning towards the 10-furlong French Derby on 31 May.