Harbinger excelled in a crushing display to race to a swift victory in the King George VI And Queen Elizabeth Stakes at Ascot in course record time.
Olivier Peslier seemed to be doing well as he remained at fourth place as they went into the straight, in the event and when he stepped on the accelerator, the outcome was thrilling.
Trained by Sir Michael Stoute, the colt blew Derby champs Cape Blanco and Workforce away, as he surged away to an astonishing 11 lengths victory from Cape Blanco finishing in second place and Youmzain in third place.
Stable mate of the winner and a hero at Epsom, Workforce, had followed his pacemaker Confront at the early phase, with Curragh champ Cape Blanco close by.
Cape Blanco held on for a distant second place, but Workforce was back labouring and far away from the placings as Harbinger smashed the contenders.
Matt Doyle from Bookmakers Sky Bet commented, "Harbinger took his field apart giving 12lbs to the English and Irish Derby winners in what looked a strong renewal.
"He now has the Arc firmly in his sights - the one race to elude his master trainer."
An exhilarated Peslier said, "You can imagine how I felt in the last furlong when I saw the big screen and I could see the others so far behind.
"The horse today is the king, he is a wonderful horse.
"I knew he was very good, but today he was flying and won so well - he's very good.
"He travelled the way I wanted and he kept going, I didn't have to ask him anything.
"He was just flying. He is a champion."
Trainer Stoute added, "Olivier was just cantering, he travelled so well and he was looking good from a long way out.
"He was a decent three-year-old and was impressive in winning the Gordon Stakes at Goodwood. Then he had a blip in the Voltigeur, but he bounced back well in the John Porter this season and has gone on from there.
"We'll consider the Arc."
The trainer said of race favourite Workforce, "Ryan said he just didn't switch off like he normally does and the ground was quick enough, it's pretty fast out there."
Aidan O'Brien said of Cape Blanco, "We're delighted with him, he ran a great race. Everyone wanted to see the two Derby winners running, they went together and there were two very good horses in third and fourth.
"They went a solid gallop and it was a great performance by the winner.
"We wouldn't mind stepping back a bit with him now. He could go to York, but we'll have to see."
Mick Channon commented on Youmzain:,"It was another great race, especially on that ground. The winner was very impressive - no crystal ball would have seen that happening.
"We'll probably go straight for the Arc now."
Alain de Royer-Dupre said of the filly Daryakana, "She was very close to Youmzain on form in France so it was a satisfactory performance. I don't know where we will run now."