South Australia 268 for 7 (Nielsen 68, Lehmann 67, Scott 54*, Siddle 3-40, Sutherland 3-67) beat Victoria 204 (Sutherland 50, Thornton 4-27, McAndrew 3-47) by 64 runs

Victoria were bowled out for 204 in 43.3 overs in reply at Adelaide Oval as SA captured their first 50-over trophy since 2011/12.

Victoria's run chase, with Marcus Harris flying on 41 from 42 balls, was well on track at 74 for 1 in the 14th over. But McSweeney, who hadn't taken a wicket all tournament with his gentle offspin, then provided an unlikely - and decisive - turn.

Harris gave himself room to hit McSweeney through the offside, but smacked the ball straight to Jason Sangha at cover. In his next over, McSweeney dismissed dangerman Peter Handscomb for 1. The SA captain instinctively flung his right hand at a lofted straight drive, parried the ball, and completed a stunning catch on the second grab.

In SA's innings, Nielsen top-scored with 68 from 93 balls, Lehmann made 67 from 75 and allrounder Scott, the player of the tournament, finished with a flourish with an unbeaten 54 from 37 deliveries.

Victorian captain Sutherland took three of the initial four wickets and veteran Peter Siddle claimed 3 for 40.

SA made a solid start with openers Nielsen and Mackenzie Harvey putting on 44 runs before Sutherland struck in the eighth over. Harvey, who hit two fours and a six in his 23 from 23 balls, chopped on to his stumps when attempting to force through the off-side.

Sutherland claimed Daniel Drew in the 14th over and McSweeney soon followed. When Sangha fell to Sutherland, SA were wobbling 118 for 4 in the 26th over, before Nielsen and Lehmann steadied with a 56-run partnership.

Lehmann later combined with Scott for a brisk 67-run stand, with the latter reaching his half-century from 36 balls in a flurry featuring seven fours and a six.