Tasmania 1 for 245 (Villani 111*, Manix-Geeves 104*) beat South Australia 8 for 242 (Webb 88, Dooley 66, Smith 3-33, Strano 3-39) by nine wickets

Tasmania won their maiden WNCL title, with Elyse Villani guiding them to a dominant nine-wicket win over South Australia.

Overlooked for Australia's 50-over World Cup squad in New Zealand, Villani scored an unbeaten 111 in Sunday's final while Emma Manix-Geeves also hit her maiden century with an unbeaten 104.

It came as the pair turned the Blundstone Arena decider on its head, coming to the wicket 1 for 40 in pursuit of 8 for 242 before reaching the target with 14 balls to spare.

Perennial battlers in their first 10 years, Tasmania had only finished outside of the bottom two twice before last year.

But with a squad that included Villani, Molly Strano, Sarah Coyte, Naomi Stalenberg and Rachel Priest, they became the dominant team of this summer's competition.

The final loomed as their biggest challenge, with South Australia in control at 2 for 208 in the 45th over after they won the toss and batted first.

But when 17-year-old legspinner Amy Smith bowled Josie Dooley for 66 and ended a 113-run stand with Courtney Webb (88), Tasmania were able to claw their way back into the decider.

Strano also took 3 for 39 in a tight spell late, while Smith finished with 3 for 33.

Then it was Villani and Manix-Geeves' time to shine. The 21-year-old Manix-Geeves drove nicely through the covers, hitting eight boundaries in her 133-ball knock.

Villani was dominant through the offside, cutting and working the ball behind square. She won the match in that fashion, cutting Brooke Harris to the boundary to spark large celebrations.

The win denied South Australia their second title, after lifting the trophy previously in 2015-16 when they ended New South Wales' long run of 10 titles.