Doncaster Mile winner Brutal will stay in training despite a partial sale to prominent Hunter Valley stud Newgate Farm.

“We have sold 50 per cent on the agreement that Brutal will race on next season,” part-owner Rupert Legh said.

A son of New Zealand-based sire O'Reilly, Brutal is rated a possible heir apparent to retired champion Winx as Australia's best racehorse.

The three-year-old confirmed his potential in winning the $3 million Doncaster Mile at Randwick last month.

Overcoming a wide draw, Brutal made his own luck to race outside the leader before claiming his first Group One win at his seventh start.

He ran an honourable second to Winx under weight-for-age conditions in the Group One George Ryder Stakes at Rosehill leading into his Doncaster triumph.

Brutal is trained by the Hawkes Racing team and the two-state stable is looking forward to the entire racing on next season.

“Brutal is just one of those extra special horses that showed rare talent from day one and to win a Doncaster at just his seventh start is something that only the really exceptional ones can do,” senior trainer John Hawkes said.

“We are thrilled he is staying in training because the world is his oyster.”

Legh said all spring racing options for Brutal would be considered.

“Our intention is that he will compete in all the major races with the Golden Eagle his target in the spring. However no race is out of the question,” he said.

The Golden Eagle is a new race added to this year's Sydney spring carnival.

It will be run over 1500m at Rosehill on November 2 and will offer $7.5 million in prize money.

Brutal is expected to stand his first season at stud next year, according to Newgate's website..