(CNN) -- Royal Ascot's most successful jockey Frankie Dettori won a thrilling Gold Cup on Colour Vision in Thursday's feature race. The 42-year-old sealed his first victory of this year's meeting by leading home a Godolphin one-two, with stablemate Opinion Poll second under Mikael Barzalona. Dettori had decided to switch rides from Opinion Poll, a decision that paid off when his Saeed Bin Suroor-trained gray won by half a length to earn the Italian's fifth victory in the prestigious race and his first since 2004. He is still some way behind the leading 11 victories by the legendary Lester Piggott, but nevertheless has more wins at Royal Ascot than any other jockey.
@highlight
Frankie Dettori and Colour Vision win Royal Ascot's Gold Cup race
@highlight
Dettori had decided to switch rides from Opinion Poll, which came second
@highlight
Pre-race favorite Fame And Glory finishes down the field
@highlight
The Queen's filly Momentary finishes third-last in Ribbesdale Stakes
But @placeholder never presented a serious threat and finished third-last in the field of 14 starters.