Willie Mullins is pondering an appeal into the result of the Betfred Cheltenham Gold Cup in which his star stayer On His Own finished a close second.
The 16/1 shot was only beaten a short-head by another Irish challenger Lord Windermere, who drifted into the Mullins runner all the way up the run in and only held on by inches at the the line.
There was a stewards' enquiry into the incident but they allowed the result to stand, with the Irish champion trainer revealing replacement jockey David Casey was disappointed with the outcome.
Mullins said: "I thought he was interfered with and he was beaten a short head and was in front after the line.
"The stewards felt he didn't deserve to get it and what more can I do at this stage David (Casey) was disappointed at the outcome of the inquiry."
"I'll have a chat with the owners and see what they want to do. I'll have a chat with David and then speak to people who are more experienced than me on appeals in England."
Mullins is now looking to the Punchestown Festival with the 10-year-old, who has fallen in his two attempts at the Grand National.
"Four weeks ago he was just a handicapper going for the Grand National, then he ran a terrific race in the Bobbyjo and we said we'd go to Punchestown for the Gold Cup there, then I got home and thought why not go for the Gold Cup in England," Mullins added.
"I had a look at the supplementary fee and talked to Graham and he said yes. Coming here this morning if I thought we'd get second I'd have been delighted. He'll go back to Punchestown."