French trainer Jerome Reynier has launched a scathing attack on US-based jockey Flavien Prat for his ride on Facteur Cheval in the Prince of Wales Stakes.

"I think it was perhaps the worst ride given to one of my horses since I became a trainer," Reynier told the Racing Post.

"In a race with loads of pace, he elected to lead the chase [of the pacemaker]. He was the first to commit on the turn for home and launched his attack three wide with no cover and too far out.

"He thought he was at Santa Anita or Del Mar. The worst thing is that I learned absolutely nothing in terms of whether the horse stays 2,000 metres or not.

"The way he was ridden, there is no way of knowing. It was just a terrible ride."