O’Brien not certain for So You Think ride

Joseph O’Brien has played down speculation linking him with the mount on So You Think in the Dubai World Cup on Saturday week.

Trained by his father Aidan, So You Think is favourite for the race on the back of a solid first season in Europe after joining Ballydoyle from Australia.

O’Brien became the youngest ever jockey to win at the Breeders’ Cup meeting when partnering another possible Dubai mount, St Nicholas Abbey, to a famous victory in the Turf.