Ashleigh Barty to play for Sydney title; Andreas Seppi makes men's final
Barty withstood 15 aces from Bertens in the 2-hour, 18-minute match to advance to her second consecutive final in Sydney.
"It's amazing -- it truly has been a phenomenal week of tennis," Barty said. "I feel like I've played great the whole week. I've had tough opponents every single round and I'm really excited to have another shot at the title."
Italian Andreas Seppi advanced to Saturday's men's final by beating Diego Schwartzman 7-6 (3), 6-4. Seppi beat top-seeded Stefanos Tsitsipas in the quarterfinals and will play in his first final since June 2015 in Germany.