Accomplished filly Karuta Queen has been sold to prominent owner John Singleton this week.

The three-year-old filly was passed in at last month’s Magic Millions National Broodmare Sale, however, drew interest from the advertising giant.

Karuta Queen has been sold to John Singleton - photo © Steve Hart

Singleton is yet to decide whether or not to give Karuta Queen another season of racing before sending her to his Strawberry Hills stud.

A spring or autumn racing campaign could see the Not A Single Doubt filly sent to either Gai Waterhouse in Sydney or Peter Moody in Melbourne.

Former owner Glenn Williams and his wife Viive rejected an offer of $500,000 at the sales, however, revealed they settled for a lesser amount from Singelton.

“The figure he came up with was actually less than what was on the table at the Magic Millions but there were a few additional incentives for the future which made it all worthwhile,” Williams said.

“Viive and I are still retaining a financial interest in the filly – officially we’ve sold the filly to John Singleton but we’ve still got a 50 per cent interest in her for a few years.

“When she produces a couple of foals we’ll get a certain percentage of her first two foals, and then after that John just takes over.”

Singelton’s resident vet felt Karuta Queen’s recent bone spur injury to her knee was reason enough not to purchase the filly, however, Singleton was unconvinced.

“From what I understand he virtually over-ruled the vet and said he was very keen to buy her as a breeding proposition,” Williams said.

“She’s still got a racing future ahead of her.

“What John’s decided to do now is send her up to his farm as of today, give her a good long spell, let that knee heal and hopefully the arthritic condition in the left knee will dissipate.”

Karuta Queen has won six of her 15 race starts and has earned close to $1.7 million in prize money.

The multiple Black Type-winning filly posted her best win in the $2 million Magic Million 2YO Classic.