Xtension has been given a 25/1 first show quote by Sky Bet for next year's 2,000 Guineas after relishing the step up to seven furlongs for the first time to land the Vintage Stakes.
However, his Group 2 success at Goodwood paid a huge compliment to his Coventry Stakes conqueror Canford Cliffs, who left Clive Cox's colt trailing in his wake by six lengths at Royal Ascot.
Canford Cliffs was cut a point as a result at the front of the market by Sky Bet for the first colts' classic and is now a 5/1 favourite from 6s.
Matt Doyle of Sky Bet said: 'Canford Cliffs made short work of Xtension at Ascot and we have trimmed his odds at the head of the Guineas market with the form being given such a boost.'
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