<text>  Willie Mullins aims to pair champion jockey Ruby Walsh with Ballycasey in the Grand National on April 11 as the trainer pins his sole hopes in the big one at Aintree on the outsider. Mullins withdrew his other potential runners Boston Bob and Prince De Beauchene on Tuesday. But the Irishman believes the conditions and slower pace at Aintree should suit Ballycasey, even if the bookmakers and punters dont see it the same way. Ruby Walsh on Ballycasey before their third in Februarys Betfair Ascot Chase - the pair look set to combine for April 11s Grand National at Aintree . Trainer Willie Mullins believes Ballycasey right will go the distance at Aintree but the bookies dont agree . I presume, all being well, that Ruby will ride, said in The Guardian. He loves that type of ground they usually get, he should go the trip and I think hes a better horse in the spring. We think hes got a nice weight. The last time Walsh rode Ballycasey, in the Ryanair Stakes at the Cheltenham Festival, the Irish jockey pulled the eight-year-old up. He didnt fire on the day and Ruby wasnt happy with him from early on, said Mullins. Perhaps the slower pace of the National will suit him. Were hoping hell be better on a flatter track. Retiring 20-time champion jockey AP McCoy will likely ride Shutthefrontdoor in the Grand National . Ballycasey is at around 50-1 with mainstream bookmakers and up to 100-1 while Shutthefrontdoor, the likely ride for 20-time champion jockey AP McCoy, among the early favourites with Rocky Creek, Balthazar King and The Druids Nephew. Walsh famously won the Grand National at his first attempt in 2000 on Papillon, trained by his father Ted Walsh, and last tasted victory there over 30 fences for Mullins in 2005 on Hedgehunter. 