The unbeaten Black Caviar notched up her 20th career victory with another brilliant performance at Morphettville.

Peter Moody's six-year-old equalled the Australian record and the feat of American star mare Zenyatta when triumphing for the 19th time in the Lightning Stakes at Flemington in February and she had no trouble going one better.

Racing in South Australia for the first time having travelled to Adelaide, Black Caviar broke smartly in the six-furlong Group One to take the early lead under regular rider Luke Nolen.

The jockey pulled the mare back into third before reaching the home turn, but it was clear she was travelling much stronger than her opponents.

While the rest got to work at the top of the straight, Nolen sat motionless and Black Caviar pulled clear without breaking sweat for another resounding success.

The Goodwood Stakes at the same track in a fortnight's time is her most likely next start, before she makes the journey to Britain to contest the Diamond Jubilee Stakes at Royal Ascot.

Moody said: "I'm glad to get that run behind us. She had a nice gallop, happy days. She's in great shape and it's fabulous to see the people here enjoy today.

"I was pretty happy with where she was (in the race). Luke has got great faith in her ability and so do I. I don't think we ever had too much concern.

"It's incredible how she copes with it all. Most sprinters are wound up, excitable types, whereas she's so laid back and takes it all in her stride. She's a remarkable horse."

Winning rider Nolen added: "It's awesome. There are a lot of people here to see Black Caviar and she didn't let anyone down.

"Ascot is going to play right to her strengths. She's a mare who appreciates a straight track. We've got the best sprinters in the world here in Australia and she is the Queen of them, so Ascot holds no fears.

"We haven't been on a plane with her before and it's a long way from home, but she's got a great constitution and a lovely nature to go with it, so I'm sure she'll cope with it fine."