Black Caviar will be presented with the keys to the City of Marion if the mare wins her 21st consecutive race in Adelaide on Saturday.

The sprinter faces eight rivals in the group 1 Goodwood at Morphettville and has drawn barrier eight for the $500,000 race.

It will be her final Australian appearance before she heads to England for the group 1 Diamond Jubilee at Royal Ascot.

Morphettville, in Adelaide's western suburbs, is in the City of Marion and mayor Felicity-ann Lewis said Black Caviar's trainer Peter Moody and her owners would be presented with the keys to the city if she won.

''It's an extraordinary feat and it's a privilege for Marion to host this iconic sporting moment,'' the mayor said.

A sell-out crowd of 30,000 is expected on Saturday. A similar crowd watched Black Caviar win the Sportingbet Classic at Morphettville last month, her 20th consecutive win.

■ TRAINER Mark Minervini is looking forward to the formidable challenge of taking on Black Caviar with promising three-year-old Go The Knuckle.

The gelding is the most inexperienced of the nine acceptors for the Goodwood on Saturday, which will be his first test at group 1 level.

He's had seven starts for three wins, including a group 2 victory in the Euclase Stakes (1200m) two starts back at Morphettville on March 12, and has been out of a place just once.

''It's a pretty daunting task,'' Minervini admitted.

Last start Go The Knuckle finished third to Goodwood rival Outlandish Lad in the group 3 DC McKay Stakes (1100m) on April 28.

''He's come through it well. He dashed down three furlongs [600m] on Tuesday morning and went well and he's pulled up well so we're looking forward to the challenge.''

Shayne Cahill will ride Go The Knuckle, who drew barrier three and will carry 55.5 kilograms under the set weights plus penalties conditions, 1.5kg less than Black Caviar.

''He's a young horse but every start he's had in his life he's hit the line hard and we're hoping he can do that again,'' Minervini said. AAP