South Australia 7 for 438 dec (Drew 208* and 6 for 191 dec (McSweeney 104*) beat Western Australia 162 and 303 (Bancroft 80, Cartwright 50, McAndrew 4-73) by 164 runs

Sheffield Shield strugglers South Australia secured a memorable 164-run win over runaway leaders Western Australia at Adelaide Oval with the result lifting them into third on the table.

South Australia have finished bottom in each of the past five seasons since making the Shield final in 2017 and were up against a Western Australia side boasting four wins from six outings, and bolstered by returning star batters Marcus Stoinis and Shaun Marsh.

Western Australia began the day at 2 for 139 in pursuit of a massive 468-run winning target, but were eventually bowled out midway through the middle session for 303.

Nathan McAndrew shone for the home side in returning 4 for 73 with the key wickets of Cameron Bancroft and Stoinis among his haul.

Bancroft was out for 80 in the second over of the day, having added only one to his overnight tally.

From there WA failed to build long partnerships despite runs for Hilton Cartwright, Aaron Hardie and Josh Inglis.

Having accumulated just five wins in the past five seasons, South Australia have now posted successive triumphs following on from a victory over Tasmania before the mid-summer break.

"It's massive for us," said Agar in reference to winning back-to-back matches. "We know that we have been in a bit of a struggle in the past couple of years, but we knew we had talent and that it would take time.

"To start seeing us get into winning positions, and then actually winning games of cricket is awesome for us and gives us a lot of confidence."

Daniel Drew scored 208 not out in the first innings to set the platform for the Redbacks, while team-mate Nathan McSweeney added an unbeaten 104 in the second innings - both career-best scores.

"It is a great sign for us that we are having multiple contributors," Agar said. "On that surface it was just about being patient [with the ball], not going searching too much and that is very pleasing."

Western Australia are still two wins clear at the top with three rounds remaining as they seek to again earn hosting rights for the Shield final.