World aiming to rule in Chester Vase

Aidan O’Brien has won the MBNA Chester Vase three times in the last six years and the champion Irish trainer sends the once-raced Ruler Of The World to the Roodee for the Group Three contest today.

The half-brother to multiple Group One winner Duke Of Marmalade earned quotes of around 20-1 for the Investec Derby after making a successful debut in a mile-and-a-quarter maiden at the Curragh a month ago.

He faces just four rivals including Feel Like Dancing, who made his racecourse bow less than three weeks ago