Seoul, South Korea, 21 September 2018 | AP / tennis.com.au

Ajla Tomljanovic moved through to the semifinals of the Korea Open after beating Mandy Minella in a see-sawing match in Seoul.

The Australian looked well in control when up a set and 3-1 but lost seven of the next eight games to find herself staring down the barrel of a quarterfinal exit.

But the world No.53 steadied on serve and lifted on return to claim the next four games for a 4-2 lead in the decider.

That still wasn’t enough, however, as the Luxembourger broke back when Tomljanovic served for the match to level scores at 5-5.

Tomljanovic then won the next two games to post a 6-2 4-6 7-5 win.

Strong serve from @ajlatom !

What a match! She beats @mandyminella 6-2, 4-6, 7-5 in #Seoul ! pic.twitter.com/JHkkHtbLEI

— WTA (@WTA) September 21, 2018

She’ll be eyeing off a career-high ranking in the low 40s if she can progress to the final.

In other results, Ekaterina Alexandrova broke Jelena Ostapenko’s serve five times to defeat the defending champion and No.1 seed 6-3 6-2 in their rain-delayed match.

Alexandrova will next face in-form No.6 seed Hsieh Su-Wei, a winner last week in Hiroshima. The winner of that quarterfinal goes on to play Tomljanovic.

Second-seeded Kiki Bertens also won through to the semifinals, downing Evgeniya Rodina 6-3 3-6 6-0.

Meanwhile, in qualifying for the WTA Wuhan Open, Queenslander Lizette Cabrera on Friday pulled off a stunning upset of Ekaterina Makarova.

The Russian, a former world No.8 and currently ranked 42nd, was the top seed in qualifying.

Yet Cabrera, ranked several places lower at No.164, completed a memorable 6-1 4-6 6-3 to set up a second-round qualifying meeting with China’s Wang Yafan.

The winner will advance to the main draw.