The Fugue produced a minor shock in the Prince of Wales's Stakes at Royal Ascot as she floored red-hot favourite Treve.

Always ideally placed by William Buick, the John Gosden-trained mare (11 to 2) sat in the group off a fast pace set by Elkaayed.

Absolutely full of running at the two pole, she stayed on strongly as Treve struggled to close the gap in finishing a never-nearer third, with Aidan O’Brien’s Magician in the runner-up spot, beaten a length and three-quarters.

Prix de l’Arc de Triomphe heroine Treve did not pick up as expected for Frankie Dettori, but there was no denying a deserved success for The Fugue who has not always enjoyed the best of fortune at the highest level.

Buick said: “She’s been an absolute star for me and everybody back at the yard. She proved today what she can do against top-class horses.

“I must say a huge thank you to everyone back at Clarehaven for getting this filly here today.

“When she gets an uncomplicated run like she did today and they come back to her, she’s lethal, like she was there.

“It means everything to everyone involved.”

Mustajeeb led home a one-two for owner Sheikh Hamdan Al Maktoum in the opening Jersey Stakes.

The Dermot Weld-trained colt had last been seen finishing third to Kingman in the Irish 2,000 Guineas and was always in the front rank in this seven-furlong contest, which represented quite a drop in class.

Initially the field spilt into two groups, but they soon came together as That Is The Spirit took them to the two-furlong pole.

Pat Smullen had tracked the leader for much of the journey and went on from there, closely attended by Paul Hanagan on Muwaary, who had also raced handily.

The two 9 to 2 joint-favourites had it to themselves through the final furlong, with Mustajeeb holding the upper hand and prevailing by a length. Giovanni Boldini was another two and a quarter lengths back in third.

Weld said: “Kingman is an outstanding miler and we were beaten fair and square in the Irish Guineas.

“This colt really appreciated the better ground today, I thought he’d win and he did it well.

“He’s a very genuine, tough, nice colt. It’s nice for Sheikh Hamdan, he’s a home-bred horse and it’s lovely for Sheikh Hamdan to have the one-two.

“This has been a very consistent horse for us. He’s a good Group winner over a mile and he’ll probably go back to a mile in the future. He’s a horse to look forward to.”

It was a reversal of fortunes for the trainers of the front two from Epsom earlier in the month, with John Gosden’s Taghrooda fending off the Weld-trained Tarfasha in the Investec Oaks.

Gosden said: “We’ll let Dermot have this one, I’m glad it was the other way round in the Oaks.

“I thought it was a very high-quality race and they (first two) both came out of a Guineas (Muwaary was fourth in the French Guineas).

“The speed of the race and the power they showed, they were well clear of the third and they are both owned by the same man, so he had no problem in the final furlong.”

Smullen brought up an Irish-trained double when Anthem Alexander justified her tall home reputation with victory in the Queen Mary Stakes.

Trainer Eddie Lynam was eager to go for this five-furlong event after her win at Tipperary earlier in the month and it was easy to see why as she arrived on the scene full of running under Smullen a quarter of a mile out.

Asked to go about her business just over a furlong from home, the 9 to 4 favourite was pressed by another Irish raider in Newsletter, who kept her honest all the way to the line before just losing second to Tiggy Wiggy, who was a neck down on the winner.

Lynam said: “She’s the real deal and she’ll get better.

“We haven’t had her an awful long time. Noel O’Callaghan (owner) was very kind to give her to me and he was very brave as everyone was trying to buy her. I’m delighted, as when you refuse money for a horse you need a bit of luck.

“I think she’s a very good filly and she’ll probably go for the Cherry Hinton (at Newmarket), but I’ll talk to Noel.”