Aidan O’Brien’s High Definition fades from Derby view after poor blood test

High Definition slips in betting with Mohaafeth new favouriteJapan’s Chester Group Three win a rare ray of light for O’BrienJapan, twice a winner at Group One level, gave Aidan O’Brien his first winner of the 2021 May Festival in the Group Three Ormonde Stakes here on Thursday but the success did not dispel concerns about the overall form of some of O’Brien’s stable, with a cloud still hanging over High Definition, the Derby favourite, after a poor blood test ruled