A fine allround display by Nathan Adcock allowed lowly South Australia to enjoy a rare, three-wicket victory despite another trademark collapse against Western Australia in the one day match at Adelaide Oval.

Chasing WA's decidedly average 7-200, the Redbacks commanded the field at 1-101 in only 21 overs, before poor shot selection by Mark Cosgrove (53) and Daniel Harris (51) allowed the visitors to close in on a game they should never have been close to winning.

Tight bowling by Steve Magoffin (2-19), Ben Edmondson and Brad Hogg reduced the home side to 7-169, before Adcock (41 not out) and Ryan Harris showed resolve to win with five balls of the match to spare.

The winning run arrived courtesy of a legside wide against Hogg, completing a result that knocks WA out of the competition, while SA could yet climb off the bottom of the table.

WA had never looked comfortable with the bat on a sluggish pitch in the afternoon, particularly once Jason Gillespie (2-26) had struck early.

His efforts were ably followed up by Mark Cleary (2-42) and Adcock (3-54), who spun the ball hard to create risks whenever the batsmen attacked him.

Pura Cup discard Daniel Cullen also bowled tidily to concede only 23 runs in 10 overs, and it took a seventh wicket stand of 61 from David Bandy (47 not out) and Hogg (33) to swell the score into respectability.

SA's response struck an early pothole when the out of sorts Matthew Elliott dragged Magoffin onto the stumps for two, and some appreciable seam movement discomforted Harris.

However he and Cosgrove batted with panache to add 95 in good time, Harris particularly severe on Hogg, while Cosgrove took a liking to Edmondson's fast medium and notched a belated maiden one-day 50 for the summer.

With only a further 100 to get the game was close to being decided, only for Cosgrove and Harris to throw their wickets away to part-time spinners Marcus North and Adam Voges.

From 3-120 a familiar tightness set in to the Redbacks' approach, youngsters Ken Skewes and James Smith becalmed then getting out in successive overs.

Their successors Adcock and Graham Manou also struggled initially in the face of some admittedly searching bowling, and a late six off Edmondson was required to find the requisite breathing space.

Gillespie earlier set WA on the path to a mediocre tally with another high class spell.

He lulled Luke Ronchi into offering no shot to one that took off stump, North nicked an angled ball, and a few runs later Langer drove uncertainly to be caught at cover for 19.

Voges then shovelled an attempted drive to the left of mid on, where Adcock took an exceptional diving catch.

The same man's hard spun off breaks claimed Chris Rogers, pouched by a juggling Graham Manou for 17, and Luke Pomersbach taken at long on from an attempted heave.

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