Archie Watson is struggling to split his two runners in the Darley July Cup as the three-year-old Dragon Symbol clashes with stablemate Glen Shiel for the first time.
Dragon Symbol was involved in a controversial finish at Royal Ascot when he was first past the post in the Commonwealth Cup only to lose the race in the stewards' room to Campanelle.
Glen Shiel was also second at Ascot in the Diamond Jubilee, a return to the form which saw him win there on Champions Day last season.
- Art Power bids to take a turn at top of sprint division
- Returning champion Oxted tops July Cup entries
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"I think we know where we are at with Glen Shiel, because he can win these Group Ones and he is consistent at his level, which is more than enough to win a July Cup under the right circumstances," said Lambourn trainer Watson, looking forward to Saturday's Group One showpiece at Newmarket.
"I would say with Dragon Symbol, we don't really know where his peak is yet. I'd say they ran similar races on the figures at Ascot, and it wouldn't surprise me to see either horse finish in front of the other because they are both high-class sprinters.
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"It is an incredibly strong race, though - you have all the strands of form coming together. You have got Oxted coming back up from five furlongs; you have got Dragon Symbol from the Commonwealth Cup, Rohaan from the Wokingham and Glen Shiel and Starman.
"It is probably the most competitive race of the season so far - and it is great to be involved. I would love to win the race, and we go there with two good chances."