William Haggas and Ryan Moore combined to secure victory with Our Channel in the Investec Derby Trial at Epsom on Wednesday.
Sent off a 14/1 chance on the back of three appearances in juvenile maidens, Our Channel made the running under Moore and held on gamely on the inside despite a strong late challenge.
Marzocco made his challenge down the middle of the track, but switched inside under William Buick late on as Our Channel tugged the rail. However, he couldn't quite reel the winner in and was a head behind at the line.
In a tight finish, Stars Over The Sea was three-quarters of a length behind in third.
Our Channel earned himself an automatic place in the Classic line-up following the narrow victory and Haggas' wife, Maureen, said: "The owner Abdulla Al Mansoori would like to go for the Derby and he was instrumental in coming here today.
"I'm not sure he'll stay, but there's only one Derby and I don't imagine he'll run again before then."
"Maybe on better ground he might get a bit further. He's a very nice, honest horse and I thought Ryan (Moore) gave him a lovely ride and got him relaxed and switched off in front."
Asked about the Derby record, she said: "We've not had another runner since Shaamit. We've tried! We just haven't had any good enough, or it hasn't worked out. At least this horse seems to be improving."
Our Channel would be Al Mansoori's first runner in the Investec Derby and the owner's racing manager, Bruce Raymond, added: "It will take a lot to put off the owner from running. He's very keen to go.
"Mr Al Mansoori instructed Jono Mills to buy the horse from the Kempton breeze-up sales and then he won at Beverley very comfortably in not a bad maiden. He doesn't look as if he needs any more experience, he's seen Epsom today and got round Beverley as well."
Sky Bet introduced the winner into their Investec Derby betting at 66/1.