Trainer Guy Walter has hailed Streama among the best he has trained following the mare's fourth Group One win in the Doomben Cup at what may have been her swan song.

Walter said he could not pre-empt what her owners, the Coghlan family, would do but admitted she was coming to the end of her career.

"She will go to stud this year but she might have a short campaign in Sydney in the spring," Walter said.

"But it would be a good way for her to end her career. She has been so consistent all the way through her career and she has never had an unsound day."

"She won the Keith Mackay Stakes as a two year old and has raced through to being a Group One winner as a rising six-year-old.

"It was her fourth Group one and she has won ten races.

"She deserved this day after racing at the top level for an extended period of time.

Walter, the trainer of 13-time Group One winner Tie The Knot, said Streama rated beside outstanding sprinter Spinning Hill among the mars he has prepared.

"She has just been so honest all the way through," he said.

"I can't express how much she means to me."

Walter also praised Blake Shinn who produced a superb ride to guide her to victory over the 2000 metres of Saturday's feature.

Shinn and Streama ($4.20 eq fav) stalked Leebaz ($7) before overhauling him in the straight to win by three-quarters of a length with the other market leader, Junoob, a further long neck third.

"Blake is the stable rider and is a great asset to me," Walter said.

"He is riding as well as anyone in Australia."

Shinn said he went into the race with the plan to track the pace and it fell into place when Leebaz went forward.

James McDonald said Leebaz had come a long way in a short time.

"Look out for him in the spring he will be a horse to be reckoned with," McDonald said.

Nash Rawiller, who rode Junoob, said he was pleased with the way the gelding adapted to Doomben.

"But I still think he will go better on a bigger track like Eagle Farm. Once I was able to get him into a rhythm he gave me a beautiful ride," he said.

Junoob's Chris Waller-trained stablemate Moriarty ran fifth and his jockey Craig Newitt said the gelding ran his usual honest race but he was out-sprinted.

Victorian galloper Akzar came from last to finish fourth and his jockey Brad Rawiller said realistically he probably couldn't win the way the race panned out.

"But it was still an outstanding run," he said.

Trainer Darren Weir is still deciding if Akzar will remain in Queensland for the Brisbane Cup (2400m) on June 7.