Postponed and Andrea Atzeni were easy winners of the Neptune Investment Great Voltigeur Stakes, but favourite Kingston Hill was a late non-runner.
Ridden confidently by Andrea Atzeni, the 5/2 favourite took up the running from the free-going Odeon with two furlongs to run.
Snow Sky had tracked Postponed into the straight and while Sir Michael Stoute's inmate beat the rest easily, he was still two and a quarter lengths behind the winner at the line
Odeon stuck on for third at 40/1 for James Given, eight lengths adrift of the front pair.
Postponed would need to be supplemented for the Ladbrokes St Leger at Doncaster in September, but Cumani was decidely cool on the idea of stepping him up to a mile and three-quarters.
He said: "I don't think he'll go to the Leger, I see him as a true mile-and-a-half horse.
"He travels well and quickens well, just like a mile-and-a-half horse, but obviously the owner will decide.
"He was good, but we've always thought he was. We just probably wasted too much time over shorter trips in the spring.
"I was thinking what there is left, and there isn't much, especially as he needs fast ground, so we will have to think long and hard about what we do with him."
Runner-up Snow Sky could, however, be Leger-bound. Sky Bet cut him from 10/1 to 7/1 for the Doncaster Classic.