Racing:Soldier Of Fortune is the "more likely runner" of Aidan O'Brien's duo in the MBNA Chester Vase on the Roodee next Thursday.
O'Brien has also put the once-raced Glenstal Abbey in the Group Three contest over an extended mile and a half.
However, the Ballydoyle handler revealed Soldier Of Fortune, who has already won a French Classic trial at Longchamp last month, is the front-runner to enhance his Vodafone Derby profile in the Chester Vase.
"Both are possibles but Soldier of Fortune is the more likely runner," O'Brien told the Racing Post.
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The Galileo colt is currently a 16-1 chance to win the Derby on June 2.