I'Anson hammered five sixes in his knock of 48 from 31 balls in the Panthers' seven-wicket loss to Langwarrin at Bendigo on Sunday.

The Panthers took 80 off the first 10 overs, but seized the momentum after the loss of I'Anson to make 9-142 from their 20 overs.

After a promising start with the ball, Langwarrin regrouped to cruise to victory with three overs to spare.

Lavington were on the back foot from the first over when captain Sam Harris was dismissed for a duck.

Nathan Brown hit two sixes and a four and was back in the sheds for 19 from 12 balls, before a 44-run stand between coach Daryl Tuffey and I'Anson got the Panthers back on track.

Tuffey made a run-a-ball 24, but there was no other major contributions with the bat after I'Anson fell.

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Langwarrin slumped to 2-8 in the third over with I'Anson and Ryan Brown striking early, but an 89-run partnership between Thomas Hussey (62 not out off 44 balls) and Travis Canavan (48 not out off 28 balls) saw Langwarrin home.

Lavington's Michael Galvin admitted they were around 30 to 40 runs short.

"Darcy I'Anson got off us to a pretty good start, but we lost wickets in clumps and that made it really hard to get to 20 (overs) and make a competitive score," he said.

"It looked really good early, Ryan Brown was bowling with pace, but their opening batsman (Hussey) knuckled down until the end where he cut loose a bit.

"We weren't ourselves in the field, we let a few through we'd usually pounce on, but there's lots to take out of it."

Langwarrin will take on Strathdale Maristians in the decider at Melbourne's Junction Oval on Australia Day.