South Africa defeated Australia in the second one-day international on Saturday to secure the series, building on Matthew Breetzke's century and Keshav Maharaj's four-wicket haul in the opener. The Proteas' bowlers again restricted Australia's middle order, with Maharaj exploiting slow surfaces that troubled the visitors' batters.

Breetzke's hundred in the first ODI had already shifted momentum toward South Africa, giving them control of the three-match series. South Africa's pace attack provided early breakthroughs in the second fixture, leaving Australia chasing the game once more.

Cricket South Africa confirmed the squad remained unchanged for the second match, with captain Temba Bavuma backing the same top order. Maharaj remained the pivotal figure after taking four wickets in the opening contest.

The result deepened Australia's difficulties in the 50-over format following a period of transition in their limited-overs setup. Officials at Cricket Australia had flagged the series as an important test ahead of upcoming international commitments.

South Africa's back-to-back victories underlined their strength across formats. The teams meet again in the final ODI, though the series outcome is now beyond Australia's reach.