Duke Top of the World

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Duke Of Marmalade is the best turf horse in the world, according to Timeform.

Aidan O'Brien's four-year-old recorded a career-best rating of 133 when pipping Papal Bull in a thrilling King George at Ascot last month.

That was his fourth Group One victory this season and puts him a pound clear of the Ascot runner-up and two pounds clear of Ballydoyle stablemate Henrythenavigator.

The dual 2000 Guineas winner has also racked up four Group One successes on the bounce, and is level on 131 with Epsom Derby hero New Approach.

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