John Ryan has been forced to give stable star Foildubh a break after he suffered an injury when left trailing in the wake of Un De Sceaux at Navan on Sunday.

The 10-year-old paid the penalty for taking on Willie Mullins' Champion Hurdle dark horse in the early part of the Follow Navan On Facebook Hurdle, eventually finished a tailed-off last of three runners under Paul Carberry.

Ryan discovered afterwards his charge suffered a nasty cut to his leg, ruining his plan of running in this Sunday's valuable Dan Moore Memorial Handicap Chase.

Ryan said: "It wasn't our plan to go off and take on Willie's horse, but Foildubh ran very free in the early part of the race and they went very fast.

"It was horrendously heavy ground and our horse just doesn't handle it. When he beat Rubi Ball in Thurles it was good ground and that's what he wants.

"He also got a very nasty cut. We're not going to be able to ride him out for at least a week and it's going to stop us running in the Dan Moore, which is disappointing as I thought he was the class horse in that race and would have had a right chance.

"It will probably be five weeks before you see him again. There is the Grade Two in Fairyhouse at the start of April he won last year (Normans Grove Chase), so we could look at that. He won't go to Cheltenham, but we might go to Aintree."

Ryan is in no doubt that Un De Sceaux is destined to make his mark at the top level, but is not sure how he will handle better ground if he does head to Cheltenham for the Champion Hurdle in March.

"He must be some horse. I don't think there's a better one in Ireland, anyway. He could win the Champion Hurdle," said Ryan.

"Hurricane Fly has been a great champion, but I think he (Un De Sceaux) would beat him if the ground is like it was on Sunday.

"The only word of caution I would have is that he might not be as good on better ground. He's a relentless galloper, but on better ground at Cheltenham it might be a different ball game."