Paul Nicholls admits it is difficult to gauge how forward Silviniaco Conti is ahead of his return to action in the bet365 Charlie Hall Chase at Wetherby.
With the incredible Kauto Star retired earlier this week, the champion trainer is looking for a new flag-bearer in the staying chase division.
Silviniaco Conti is an obvious candidate, having signed off a promising novice campaign with a scintillating victory over three miles at Aintree.
"He worked nicely on Thursday so we'll let him run and see how we get on," said Nicholls.
"We have to go somewhere and this is a good place to start him off.
"He's done enough work, but some of ours are needing a run and some aren't, so it's a job to tell.
"He's in great form and if the ground is good to soft that will be perfect."
Silviniaco Conti faces just five opponents in the West Yorkshire feature, with last year's winner Weird Al a surprise absentee for Donald McCain, along with the talented, but injury-plagued, Diamond Harry.
Last year's runner-up Time For Rupert is, however, among the declarations.
Master Of The Hall, Planet Of Sound, Midnight Chase and Wayward Prince complete the line-up.