Mark Johnston last won the King Edward VII at Royal Ascot with Boscobel in 2007 and after getting off the mark for the week on Wednesday with Rainfall in the Jersey Stakes, the Middleham handler's confidence will be high.
He runs Monterosso, winner of four of his last five starts, and his only defeat came at the hands of the reopposing Green Moon, with whom he has a 6lb pull at the weights.
The trainer said: "He's a very progressive horse but there are a few variables obviously. He's got to continue to progress to win at this level and he's got to prove he can get the trip as he's never been over a mile and a half before."
He added: "He hasn't looked like stopping over 10 furlongs so far and Frankie (Dettori) is very confident that this horse can go over any trip because he settles so well, so we'll see."
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