Irish Derby winner Jack Hobbs warmed up for next month's Prix de l'Arc de Triomphe with a comfortable victory in the September Stakes at Kempton.
John Gosden's 1-5 favourite looked superb in his first run since triumphing at the Curragh in late June.
He kept in contact with the leader Aussie Reigns early on before pulling away to win by over three lengths.
Meanwhile, at Haydock, Twilight Son (10-1) claimed the Sprint Cup after a photo finish.
The Henry Candy-trained three-year-old, ridden by Fergus Sweeney, held off the fast-finishing Strath Burn (33-1) from the Charlie Hills yard by a short head while another Hills horse Magical Memory (14-1) was third.
Jack Hobbs, who was runner-up to stablemate Golden Horn in both the Epsom Derby and the Dante Stakes at York, is seen by many as the main challenge to Arc favourite Treve who is chasing her third consecutive win in the French race on 4 October.
Jockey William Buick said after the three-year-old's victory on the all-weather track: "He has done well for his break. It was a bit of a racecourse gallop for him. That's what I wanted, I didn't want him to come here and have a hard race."
Gosden added: "There's no reason why we won't go to France and he has won well today. I think he is an improving horse and like his father he will get better at four and five"
BBC racing correspondent Cornelius Lysaght
"It would have been a major shock if Jack Hobbs had not beaten his rivals here, but it was still good to see the colt, who's now a stronger second favourite for the Arc, demonstrate his well-being in such pleasing style.
"Just as satisfying was the physical appearance of the son of the stallion Halling; he looked more mature even than 10 weeks ago when running away with the Irish Derby."