Frankie Dettori claimed his first Group One winner since his comeback and can look forward to riding one of the market leaders for the Prix de l'Arc de Triomphe as Treve turned in a dazzling performance on a remarkable day of trials at Longchamp.

Coming in between the victories of Japanese raiders Kizuna and Orfevre as the ante-post market changed almost minute by minute, Criquette Head-Maarek's diminutive but unbeaten filly will be aimed for France's greatest prize in three weeks time, as she was in a class of her own against her own sex in the Prix Vermeille.

With a popular trainer and a show-stopping change of gear, Treve could gain a real following and a composed Dettori had no concerns when she was rather trapped on the rail for much of the mile and a half.

Switched wide in the home straight, she quickly whittled down the advantage gained by Jane Cecil's high-class Wild Coco and won comfortably by a length and three-quarters.

Dettori, who returned at the start of summer after serving the well-publicised drugs ban he picked up when riding in France, was cementing his partnership with Sheikh Joaan Al Thani and immediately embraced the owner.

He said: "It's brilliant. She's the first decent horse I've ridden for a while, so it's great.

"The Arc will be a different type of race, so I just hope I'm drawn on the fence so I can get some cover. It was always the plan to ride her like that as I knew she had a great turn of foot."

Head-Maarek said: "She didn't do anything today, she's hardly breathing and she only raced for a furlong as she was held in.

"She was a bit fresh today, so we should have some more to come in the Arc."

A frenzy of fans and media greeted both Japanese winners as the Asian nation attempts to finally collect a prize which has so far eluded them.

There was no more agonising defeat than that of Orfevre 12 months ago, when he rolled around in heavy ground with the race seemingly in his grasp as Solemia edged hime out.

However, Yasutoshi Ikee's powerful chestnut was far more impressive than when he had collected the corresponding Prix Foy and simply toyed with his opposition, albeit in a race run at a crawl which was nearly five seconds slower than the fillies’ race.

After looking around for dangers as he eased three lengths clear, jockey Christophe Soumillon said: "After a performance like that, there's not much more I can say.

"When he wants (to be), he is unbeatable."

Kizuna's margin was rather smaller in the Prix Niel, but he came out a short head in front of the Investec Derby winner Ruler Of The World.

A son of national hero Deep Impact, who caused chaos in the on-course betting offices as Japanese racegoers backed him aggressively into favourite in 2006.

He was eventually disqualified from third, but three-year-old Kizuna, last seen taking the Japanese Derby back in May, will return as one of the strongest contenders.

Trainer Shozo Sasaki is expecting further improvement and said: "This was his first run abroad so I'm very pleased.

"He was about 80% today compared with the Japanese Derby so we will work hard to get the final 20% before the Arc."

Ryan Moore needed to thread his way though horses on Ruler of The World, absent since his Irish Derby fifth, and trainer Aidan O'Brien said from the Curragh: "He ran really well and I thought he'd won.

"He was coming back from a break so you would have to be delighted with that."

Flintshire, one of Andre Fabre's smart quartet in the race, lost his place as ante-post favourite after finishing a narrow fourth, just behind stablemate Ocovango.

His participation is in doubt, as owner Khalid Abdullah's racing manager, Teddy Grimthorpe, said: "He has run a perfectly respectable race but the ground is soft and he can't show his best on it.

"As to running in the Arc, we'll have to wait and see.

"We want to run, but the ground will have to come into it."