Frankie Dettori has lost the ride on Prix de l'Arc de Triomphe winner Treve and will be replaced by Thierry Jarnet in the Prix Vermeille at the request of trainer Criquette Head-Maarek.

Jarnet partnered Treve to her first three victories last season, completing the hat-trick with a brilliant display in the French Oaks, following which she was snapped up by Sheikh Joaan Al Thani's Al Shaqab Racing operation.

After being announced as Sheikh Joaan's retained jockey, Dettori took over in the saddle when Treve landed last year's Prix Vermeille.

Dettori was forced out of the Arc through injury and Jarnet steered her to a memorable victory in October's Longchamp showpiece.

The popular Italian has been back on board this year, with Treve finishing second to Cirrus Des Aigles on her return in the Prix Ganay before returning with pulled muscles after her third in the Prince of Wales's Stakes at Royal Ascot.

Head-Maarek feels reuniting the previously successful partnership will have a positive effect this weekend and going forward.

"Frankie is not going to ride her in the Vermeille as I have decided Thierry Jarnet will ride. Normally, that means Thierry will ride in the Arc," Head Maarek said.

"It was my decision, nobody else's. I think it is the best decision for the filly and when I told Frankie he was very good about it and understood my point of view.

"Thierry did very well on the filly last year and there is nothing more to say."

Al Shaqab's racing advisor Harry Herbert stressed the rest of Dettori's retainer was unaffected by the Treve decision.

"It's obviously very disappointing for Frankie, but he's a phenomenal team player. He's been amazing on this."