The two best players in the field will contest today's ASB Classic final, with top seed Agnieszka Radwanska to take on former champion and now three-time finalist Yanina Wickmayer.
Radwanska won through by claiming two tough sets from hard-hitting American Jamie Hampton, with both decided by a tiebreaker.
Wickmayer, the third seed, outlasted destructive German Mona Barthel in a three-set classic, triumphing 6-4 1-6 7-6 in 1h 47m to book her third final appearance in the last four years.
The 2010 champion was the dominant player on her side of the draw, but she came under considerable pressure yesterday when she was blown away in the second set after taking the first comfortably.
"In the second set, I didn't think I did anything wrong," Wickmayer said. "She was just smacking the ball and everything was going in. Some points I just didn't see the ball, it was going too fast for me."