Twiston-Davies said: “He was the best of the British in the race and has he got any worse? I don’t think so. He is in tremendous form.
“I’m just amazed Santini is favourite for the Gold Cup. We were giving him 2lb (at Cheltenham in January) and we were looking all over the winner at the bottom of the hill.
“He slipped on landing and that cost him the race.
“He is 33-1 and Santini is favourite, but I think we have a very good chance.”
Meanwhile, Ascot Chase winner Riders Onthe Storm remains on course to make it four from four this season in the Ryanair Chase.
Twiston-Davies said: “He did all he could and that was win nicely.
“Obviously Cyrname didn’t turn up at the races and they have said Traffic Fluide might have won, but Josh Moore thought he was tired.”