Unbeaten mare Annie Power is set to take on four-time winner Big Buck's in the World Hurdle at Cheltenham with Ruby Walsh to ride.

The six-year-old also holds entries in the Stan James Champion Hurdle and the Mares' Hurdle, and her target at Prestbury Park has been the subject of speculation for many weeks.

But trainer Willie Mullins has outlined the big staying prize on Thursday week as the intended destination for the Annie Power.

Walsh rode Big Buck's to his four victories.

"All being well, and if everything goes right, Ruby will probably ride Hurricane Fly in the Champion, Quevega in the mares' race and Annie Power in the stayers' (World Hurdle)," Mullins said.

"We've had a good chat with the owners and at that the moment that's the way it looks, they are all happy on that score."

Annie Power's three outings this season have all come in Britain, with victories at Ascot, Cheltenham and, most recently, at Doncaster.

Coral make Annie Power 15-8 favourite from 9-4 for the World Hurdle, easing Big Buck's to 9-4 from 15-8 ahead of what promises to be one of the most eagerly-awaited clashes of Cheltenham week.