Consider also: Douvan got beaten 5 lengths on his Rules debut, although he was a 4yo not 5yo as Jonbon is. That autumn of his 4yo year he beat Sizing John 12 lengths and as a 5yo (though technically not quite as he was a May foal) he was walloping the Supreme field.
Looks a lovely big strong horse to me and I thought it won very nicely.
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