In the primary assembly of a three-match collection, it was the Proteas who impressed to triumph by 74 runs, Klaasen’s unbeaten 123 proving key, whereas Lungi Ngidi (3-30) was medical with the ball.
The victory got here regardless of a sluggish begin from the host, which was lowered to 48-3, with newcomer Janneman Malan among the many victims as he was out for a golden duck.
But one other debutant shone way more brightly, Kyle Verreynne’s helpful contribution of 48 – together with David Miller’s 64 and Klaasen’s heroics – serving to South Africa to 291-7.
Even within the absence of influential paceman Kagiso Rabada, out with a groin pressure suffered within the T20 collection, the house aspect utilized strain with the ball to restrict Australia’s response and seal victory within the 46th over.
Malan fell first ball to Mitchell Starc, given out lbw on assessment, and captain Quinton de Kock was out tamely for 15 when he nicked one to Alex Carey off Josh Hazlewood.
Temba Bavuma dragged on from Pat Cummins to go away South Africa in actual bother earlier than Verreynne and Klaasen’s 78-run stand stirred a revival.
Klaasen, who racked up a maiden worldwide hundred, mixed simply as successfully with Miller after Verreynne was caught at sq. leg by Marsh, the newly minted partnership including a decisive 149 runs.
With a sizeable goal to chase, the vacationer struggled to get going, though Steve Smith’s 76 did elevate hopes of creating it a aggressive contest after openers David Warner (25) and Aaron Finch (10) had been dismissed by Ngidi.
When Smith was trapped lbw by Anrich Nortje within the 35th over, Australia was operating out of overs and wickets, requiring 118 runs from 96 balls.
Carey’s 5 from 16 deliveries was decidedly unhelpful, however he was not the one one to come back up quick on a day when Australia merely failed to fireside, ending 217 all out.