El Salvador gave Donnacha O'Brien a landmark big-race success in the Irish Cesarewitch at the Curragh.
The younger brother of Joseph O'Brien, the 16-year-old had only ridden his first winner last month but defied his inexperience with a fine ride on his father Aidan's five-year-old, running in the colours of his mother, Anne-Marie.
Burdened with top-weight, O'Brien's 7lb claim proved invaluable as Hidden Universe and Pat Smullen pressed hard through the final furlong.
El Salvador found plenty for pressure, however, and saw it out for a length success at 25-1.
Marchese Marconi was third, with Asbury Boss fourth.
Aidan O'Brien said: "I'm delighted and it's great for Donnacha. It's a hard race to win. He's a tall fellow and is doing his leaving certificate this year. It was a nice, patient ride as the start was a bit messy and he was a long way back.
"He was second in the Queen Alexandra Stakes at Royal Ascot this year, and is a tough horse."
It was a fourth winner for Donncha O'Brien and a second Irish Cesarewitch for O'Brien after Bright Horizon in 2010.
