Long Run recaptured his King George VI Chase crown at Kempton over Christmas and attempts to do the same in the Betfred Gold Cup at Cheltenham on Friday.
Nicky Henderson's 2011 winner could manage only third in the blue riband 12 months ago.
"I think we're happy. He came back and won the King George - it was a bit of an untidy one admittedly, but he won it. He likes Cheltenham and I do think he was a bit flat last year. I can't say he is miles better this year, but I think he is better," said the Seven Barrows handler.
"The whole race has a look to it that there's a very, very big door that's wide open and inviting someone go through. There are a lot of very good horses but room for a star to come out of it.
"Long Run has got his King George back, he's got to get his Gold Cup back and probably shouldn't be twice the price of (stablemate) Bobs Worth. Everything is in good order, I just think it's terribly open."
Paul Nicholls saddles Silviniaco Conti, who is unbeaten in three runs this season.
"He's won his last four chases, and he's three from three this year. He's run in great Gold Cup trials and he keeps winning. He does everything right - he keeps jumping, he travels well and he keeps winning. He's not flashy - he just does the job - and that's what I like about him," said the Ditcheat handler.
"People say he doesn't have Cheltenham experience, but that's only because he hasn't been there. He jumps well, has a bit of pace and he stays.
"It's an interesting race but I'm very happy with him. You'd have to think we'd have a grand chance. We're not going into the race thinking we are going to win, but we think we've got a chance and we're looking forward to it. I'm really happy with my lad."
