Kyprios (left) © Photo Healy Racing
The 1/12 favourite Kyprios was a workmanlike winner of the Saval Beg Levmoss Stakes under Ryan Moore.
The 2022 Ascot Gold Cup winner was pushed along in third entering the straight before coming through to lead over a furlong out to beat stablemate Queenstown by a length with Yashin in third.
The three horses had finished in the same order in last month's Vintage Crop Stakes at Navan.
Owned by breeders Moyglare Stud Farm and the Coolmore partners, the five-year-old remains 5/4 favourite with Paddy Power to notch a second win in the Royal Ascot stamina test.
“We're delighted with him, he's a lovely horse. When he gets there he just waits but Ryan was very happy with him,” said O'Brien.
“Ryan said he has plenty of speed left, all the speed is there, but he just pulls up when he gets there, he's just lazy.
“The plan was obviously the two runs and then go to Ascot, if everything is well with him then.
“It's amazing that he came back, it's great to have him back. He just has a lovely relaxed way of doing it.”
Quotes from Gary Carson
