Pretty Brazen will be given the opportunity to tackle the top autumn three-year-olds after a courageous victory in the Sandown Guineas.

The Tony and Calvin McEvoy-trained filly will be spelled following Saturday's Group Two win and set for an autumn campaign that could potentially include the Australian Guineas at Flemington.

"Now that I know she can run a strong 1600 metres there's a number of races that will be available," Tony McEvoy said.

"We can look to the Australian Guineas but there's also options in Sydney."

Ridden by Luke Currie, Pretty Brazen, the $3.50 favourit, accounted for Conqueror ($14) by a long-neck with Heart Of Puissance ($4.20) a short-head away third.

McEvoy said Pretty Brazen oozed class at the yearling sales and owner Linda Huddy was forced to bid $700,000 to purchase the filly.

McEvoy said Pretty Brazen, a daughter of Brazen Beau, had confirmed her future as a broodmare when retired from racing.

"She's got class, beautiful movement, has a beautiful temperament and the reason she cost $700,000 was I wasn't the only one that liked her," McEvoy said.

"There was a lot of competition and I think we can relax now and enjoy the future.

"We had a sit down after Flemington after she ran so well and I said to the owners let's have a go at the mile.

"It's worked out magnificently and to win a Group Two with a valuable filly just means so much."

Pretty Brazen provided jockey Currie the third leg of a winning treble after scoring on Hanseatic, for Anthony Freedman, and aboard the McEvoy-trained Xilong.

It was Currie's fourth metropolitan treble for the year and the jockey said Pretty Brazen was brave after striking the lead.

"The way the race mapped I wanted to put her in a spot early," Currie said.

"I think she's better, especially going out to a mile, having a cuddle but I used her, took the punt, and she was good although she was out on her feet late.

"She'll be better next time for it."