Petra Kvitova made a shaky start but found her attacking verve midway through the match to beat world number one Caroline Wozniacki 3-6 7-6(3) 7-5 in the Qatar Open on Saturday and set up a final with Spain's Garbine Muguruza.
Pliskova takes Qatar Open title
Simona Halep pulled out of the Qatar Open with a right foot injury shortly after she reached the semi-final with a dominant 6-0 6-4 win over American qualifier Catherine Bellis on Friday.
Petra Kvitova will face Caroline Wozniacki in the semi-finals of the Qatar Open after Julia Goerges withdrew from their last-eight match on Friday.
Kvitova, seeded 16th for the WTA Premier 5 event in Doha, broke her German opponent, who is 11 places above her in the rankings at world number 10, in the third game before taking the opening set 6-4.
Caroline Wozniacki and Simona Halep secured safe passage to the third round of the Qatar Open on Wednesday.
The pair, who met in the Australian Open final when Wozniacki broke her grand slam duck, both enjoyed straight-sets wins in Doha.
But not every seed in action emerged unscathed, with the likes of Jelena Ostapenko, Kristina Mladenovic and Madison Keys dumped out.
Double Wimbledon champion Petra Kvitova breezed through her Qatar Open first-round match against Cagla Buyakakcay on Tuesday, losing just four points out of a total 28 played in the first set.
Kvitova -- currently ranked 21 in the world as she continues her return to top-class tennis following a horrific knife attack just over a year ago -- won 6-0, 6-3.
Beaten Australian Open finalist Simona Halep said on Tuesday she enjoyed everything that happened in Melbourne despite being left in tears at losing the chance of her first Grand Slam title.
"Everything was beautiful at that tournament even if I lost the final," the Romanian said at a press conference in Doha as she arrived to play in this week's Qatar Open.
The renewal of Garbine Muguruza's coaching relationship with Conchita Martinez got off to a winning start at the Qatar Open on Tuesday, although she took eight match points to complete a 6-3 6-4 victory over Duan Ying-Ying.
Five-time Grand Slam winner Maria Sharapova suffered a shock defeat in the first round of the Qatar Open on Monday, dumped out in three sets by outsider Monica Niculescu.
The Romanian, ranked number 92 in the world, 51 places behind the Russian, won 4-6, 6-4, 6-3.
Little more than a fortnight since they met in a scintillating Australian Open final, Caroline Wozniacki and Simona Halep are on course to meet again, this time in the Qatar Open.
The two best ranked players in the world lead a high-quality field in Doha, where nine of the top 10 women players will compete.
Karolina Pliskova beat Caroline Wozniacki for the first time in her career to claim the Qatar Open title on Saturday.
The powerful Czech won in straight sets 6-3, 6-4 for her eighth WTA title and her second of the year, after her victory at the Brisbane International last month.