MASAR and Roaring Lion are set to clash again in next weekend’s Group 1 Coral Eclipse.
Masar has beaten the Lion three times this season, but back at a mile and a quarter many will give John Gosden’s colt more of a chance.
But Charlie Appleby continues to ride a wave and his momentum continued into Royal Ascot, where Blue Point and Old Persian were his stars.
He’s warned any potential Eclipse rivals that they will have to be at their very best to challenge his Derby winner.
Masar worked under his usual partner in Brett Doyle over seven furlongs and pulled well clear of Alqamar and African Jazz on the July Course.
Godolphin will hope their decision to skip the Irish Derby for the Sandown race will pay off.
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Appleby said: “I was very pleased with him. He had his same two galloping companions there and we covered the same trip. He did it equally as well, if not probably better, than before Epsom.
“I’m not going to hype him much more, as he is a Derby winner, so I can’t really put much more positive spin on it. Physically, he looks great.
“We go in there with a horse we feel is in the best condition we can get him in and at this stage they have got us to beat.”
The son of New Approach currently heads the betting for Saturday’s race at around 7-4.
He added: “As Brett said, he is the ultimate professional and I think he has shown us what we wanted to see and that was his well-being.
“Epsom is Epsom and you don’t go there and have an easy race. He knew he had a run.
“To be fair to the horse he took a lot of media attention on in the following 48 hours. It is not like he got as much rest as he would normally get. He is a professional, though, and took it well.
“He put on what weight he lost at Epsom within about eight days and since then has put some more on again.
“This will put him spot on for the Eclipse.”
Partnered by Kieran O’Neill, Roaring Lion also galloped at Newmarket. He pulled cosily clear of work partner Master Singer during exercise.
John Gosden said afterwards: “It’s been a little tricky. He has only been on the all-weather, so he needed to come down here and have a feel of the grass again, as it is quite a long time since the Derby.
“We said we would go for this race (Eclipse) straight after the Derby. I said standing at Epsom we will freshen him up and go for this, so we are sticking to the original plan.”