Lesia Tsurenko could not complete another upset and was beaten by Karolina Pliskova in Sunday's Brisbane International final.
Karolina Pliskova has won her second Brisbane International, overrunning Lesia Tsurenko 4-6 7-5 6-2 after being just two points from defeat.
Naomi Osaka of Japan reacts after missing a shot during her semi-final match against Lesia Tsurenko of Ukraine at the Brisbane International tennis tournament in Brisbane, Australia, on January 5, 2019.
The Japanese second seed has never played at the Sydney International.
The 18-year-old, who is 152nd in the WTA world rankings, looked like she was headed for another stunner when she dominated the first set against the defending champion Goerges.
Tsurenko held sway in the first hour of the contest on Pat Rafter Arena, skipping clear in both sets after the 2017 champion had worked her way back from an early break.
"When you're able to turn these matches around, it gives you some extra and different confidence", Pliskova said.
No. 2 seed Julia Goerges of Germany ended the surprising run by Canadian teenage qualifier Bianca Andreescu, beating her 2-6, 7-5, 6-1 in the final in Auckland, New Zealand.
"I feel like previous year I did a lot of that", she added.
"I always had super confident coaches. they are more confident than me", she laughed.
On Friday, Pliskova won her quarterfinal match against Ajla Tomljanovic, also in three sets, and faces Donna Vekic in the semifinals.
"I felt I was getting better with the time".
Much of the attention fell on Osaka, though, who was at a loss to explain why she struggled for fluency against her Ukrainian opponent.
"I don't want to say that this was my best tennis, but it was quite a high level", Tsurenko said.
"I think today I learnt. what I can do to improve the situation", she said.
Kei Nishikori was playing Jeremy Chardy in the first of the men's semifinals, and Jo-Wilfried Tsonga had a night match against fourth-seeded Daniil Medvedev.