But a nail-biting finish ensured the Australians progressed by the narrowest possible margin for the second round running to reach the gold medal final and guarantee Tasmania another medal.

Having defeated Malaysia 14-13 in the quarter-final, the team of Van Asch, Carla Krizanic, Natasha Scott and Kelsey Cottrell repeated the rollercoaster ride in the semi as Canada dropped behind 5-1 before levelling the scores and finally taking the lead at 8-7.

Leading 9-8 but facing elimination in the 15th end, Scott produced a perfect drive to save the campaign and limit Canada's advantage to just one.

In a nerve-wracking sudden death end at Broadbeach Bowls Club, the Aussies stayed cool to win 10-9 and progress to Monday's final against reigning champion South Africa scheduled for 12.15pm.

"It was very nerve-wracking last few ends," said Van Asch, 30.

“We were down on what would have been the last end of the game and Tash had one bowl left to try and win the game for us or push it to an extra end.

"There were a few options and we backed her with the drive which is a big strength of hers. She got the jack out of bounds, hers is in the ditch so the Canadian skipper's drawn shot which tied the scores and that was a good result for us because we were down game and happy to go to an extra end to see what would happen there.

“If Tash had missed that we'd have been gone and playing for bronze tomorrow. I felt really sick waiting for it to come down. I had complete faith in whatever shot she chose I was confident she would get but it's hard when you're the one on the side and you've got to watch it happen. She executed it awesome.

“We were focusing on getting a good start because against the Malaysians we had a tough start and had to come from behind and didn't want to do that again.

“The Canadians played really well in the middle section, really took it to us and put us under the pump again.”

With world titles to her name in fours, triples and pairs, Van Asch is now assured of a medal at her maiden Commonwealth Games.

“It's pretty exciting to be guaranteed a medal but obviously we want it to be gold.

“We've got this far and have one game between us and gold.

I think we've been playing quite well even though we have had a few tight tussles at the end.

“We've just got to keep that form going but the South Africans are the defending champions from Glasgow and have had some strong wins, especially against New Zealand, so we know we've got to be on our game to beat them.

“We got through our section with some big wins so it's been good to have those tight hitouts and know that we can perform under pressure but it would be really nice to take that pressure off ourselves.”