Arzal has been ruled out of the Vincent O'Brien County Handicap Hurdle at Cheltenham on Friday.

The Harry Whittington-trained five-year-old suffered a knock when making a mistake early on in the Imperial Cup at Sandown on Saturday.

"He won't be running on Friday," said Whittington.

"He picked up a problem at the second hurdle and that was why he ran a disappointing race."