Trainer Sir Henry Cecil has warned that "the best is still to come" from his unbeaten colt Frankel.
The five-time Group One winner continued his build-up to the Queen Elizabeth II Stakes at Ascot on 15 October with a workout on Newmarket Heath under regular jockey Tom Queally.
Frankel will be seeking to extend his unbeaten run to nine in the £1m race.
"He's growing up mentally and is far more relaxed and happy which makes him easier to train," Cecil told BBC Sport.
"I wanted Tom on him to give him confidence that the horse is easier to ride than he was [earlier in the season]."
The 10-time champion trainer, who hailed Frankel as "the best I've seen" after he made it eight wins from eight races with victory in the Sussex Stakes at Glorious Goodwood in July, has been impressed with his star horse since.
"He's physically done well and is a stronger horse," he explained. "He's more helpful."
Frankel is odds-on favourite to win the Queen Elizabeth II Stakes on the same day illustrious stablemates Twice Over and Midday clash again, this time in the Champion Stakes. Twice Over beat Midday to win the Juddmonte International Stakes at York in August.