The Tom Dascombe-trainer Brown Panther fought hard to see off odds-on favourite Hillstar and land the Boodles Diamond Ormonde Stakes at Chester on Friday.
The 6/4 second favourite took up the running with a couple of furlongs to go but always had the Sir Michael Stoute-trained four-year-old breathing down his neck and had to dig deep to repel the challenge of Ryan Moore's mount.
However, jockey Richard Kingscote always had enough to hold the 4/5 favourite at bay and the pair hit the line in front to record a two and a quarter length victory.
Jockey Richard Kingscote was wreathed in smiles after the race and was full of praise for the way in which Brown Panther stuck to his task.
"He's growing up all the time and still going the right way," said Kingscote.
"I knew Ryan was there or thereabouts turning for home but I was really pleased how he lengthened away between the three and two poles.
"I was able to snatch a view of the big screen and saw that Ryan was there so there was no easing up in that ground.
"It's great for the stable and he's a popular winner."
Co-owner Andrew Black, who founded the popular betting exchange Betfair, was delighted following Brown Panther's victory and thinks there is more to come from his horse this year.
"I love this horse - he's just fantastic and such a professional," said Black.
"My relationship with Michael (Owen, former footballer and co-owner), goes back to my Betfair days and he's a great man to own horses with. I don't like the limelight and just like to keep in the background so Michael is a perfect frontman from that perspective.
"I genuinely think he could win the Gold Cup (at Royal Ascot).
"I've always thought he looks like a marahon runner and thought that he'd come into his own over a longer distance. However, he does look like a mile and a half horse this year. He's filled out a lot and it a lot thicker through the middle.
"One of his best qualities is that he is so genuine and puts it in for us every time. I think he'll be better this year than he was last year."
Brown Panther's other co-owner, Michael Owen, thought that the six-year-old could have another race before heading to Royal Ascot.
"The Gold Cup at Royal Ascot is definitely the plan this year." said Owen.
"We had to go somewhere and this was the early plan which has paid off. He could still head to Sandown before the Royal meeting but we'll see how he comes out of this.
"He's got loads of stamina and Richard (Kingscote) has given him a great ride. I've almost lost my voice as I was screaming so much!"
Brown Panther has been cut to 8/1 (from 10/1) for the Ascot Gold Cup following his success in the Ormonde Stakes and their spokesman, Michael Shinners, believes there could be more to come from the six-year-old when stepped up in trip.
"Brown Panther showed that he was no back number in the Ormonde at Chester and it's conceivable that he could improve still with a step up in trip."