Paceman Mitchell Starc and spinner Nathan Lyon have taken three wickets apiece, as Australia bowled South Africa out for 152 before tea on day one of the series-opening test at Brisbane.
Australia captain Pat Cummins won the toss and sent Dean Elgar's side in to bat on a green wicket almost undistinguishable from the surrounding grass.
It paid immediate dividends, as the Australian quicks crashed through the Proteas top order, before Lyon (3/14) did the damage in the second session.
Reduced to 27/4 early, South Africa rallied through Kyle Verreynne and Temba Bavuma, who built a defiant partnership of 98 runs, before Starc (3/41) intervened.
The left-armer softened up Bavuma with a short ball that crashed into his gloves and then had the pint-sized batsman edge onto his stumps for 38, with a fine delivery that nipped back off the seam.
South Africa had rallied to 125/4 before Bavuma's dismissal, but ended up losing their last six wickets for 27 runs.
Lyon grabbed his first victim, when Marco Jansen (2) charged down the pitch and threw away his wicket, with a miscued pull that soared into the air and was caught by Cameron Green.
Keshav Maharaj was out for two, caught by Steve Smith off the bowling of Starc, who finished the session one wicket shy of his milestone 300th.
Lyon had Verreynne out for 64, caught by Smith at slip, making the Australian duo the most prolific bowler-fielding pair in the nation's history, with a record 52 dismissals.
Lyon then removed Anrich Nortje for a duck, with a ball that reared out of the wicket to catch a glove, before being snaffled by Travis Head in close.
Fast bowler Cummins wrapped up the innings by having Lungi Ngidi out for three, with Green catching the edge in the gully.
Third Australian seamer Scott Boland earlier took two wickets in three balls, removing opener Sarel Erwee for 10 and Khaya Zondo leg before wicket for a duck.
Australia's bowlers had plenty of assistance, with the ball moving sharply off the seam and swinging under cloudy skies.
However, Elgar gave Starc the first wicket on a platter, when he gloved a ball down the leg-side to be caught behind for three.
Cummins took the second wicket, removing Rassie van der Dussen for five, the number three feathering an outside edge through to wicketkeeper Alex Carey.
Reuters
