Idaho Sun has been scratched from Tuesday's Sky Bet Supreme Novices' Hurdle after suffering a setback.
The six-year-old Grade 1 Formby Novices' Hurdle winner was among the leading British-based contenders for the Cheltenham Festival's curtain-raiser having finished sixth in last year's Champion Bumper and gone 3-3 over jumps earlier this season.
However, Harry Fry's general 14/1 shot is lame and misses the big race.
A brief statement on the trainer's social media channels read: "IDAHO SUN will unfortunately miss the Supreme Novices’ Hurdle @CheltenhamRaces next week due to a hind limb lameness that requires further diagnosis."
Nicky Henderson's Old Park Star remains the market leader at 9/4 with Sky Bet and Paddy Power but there has been significant support for the Willie Mullins-trained Mighty Park who is into 11/4 after not featuring among the acceptors for next Wednesday's Turners Novices' Hurdle over two and a half miles.
Mighty Park is owned by JP McManus, who turns 75 on Tuesday March 10.
More from Sporting Life
- Free bets
- Racecards
- Fast results
- Full results and free video replays
- Horse racing news
- Horse racing tips
- Horse racing features
- Download our free iOS and Android app
- Football and other sports tips
- Podcasts and video content
Safer gambling
We are committed in our support of safer gambling. Recommended bets are advised to over-18s and we strongly encourage readers to wager only what they can afford to lose.
If you are concerned about your gambling, please call the National Gambling Helpline / GamCare on 0808 8020 133.
Further support and information can be found at begambleaware.org and gamblingtherapy.org.