The Czech bounced back from losing a first-set tie-break to win 6-7 (5/7) 6-0 6-2 in sweltering conditions to set up a meeting with America's Anna Tatishvili.
Tatishvili beat Kristyna Pliskova 6-4 7-6 (7/4) to rule out the chance of a family affair in the second round.
Johanna Konta celebrated entering the world's top 20 in style as she blitzed American Victoria Duval 6-3 6-0.
Pliskova wins WTA Nottingham
Konta moved up to 18th in the latest WTA rankings, becoming the first British woman to enter the top 20 since Jo Durie in 1983 following a superb 12 months.
And she looked every bit the part in sweltering conditions in Nottingham as she dropped just three games in a straight-sets win over world number 580 Duval.
American Christina McHale saw off Magda Linette 6-1 6-4 while Anett Kontaveit beat Lauren Davis 6-3 6-1 and China's Saisai Zheng beat Britain's Freya Christie 6-4 6-2.
Results from the Nottingham Open Women's Singles Round 1 matches on Monday
Zheng Saisai (China) beat Freya Christie (Britain) 6-4 6-2
8-Christina McHale (U.S.) beat Magda Linette (Poland) 6-1 6-4
1-Karolina Pliskova (Czech Republic) beat Anastasija Sevastova (Latvia) 6-7(5) 6-0 6-2
Anna Tatishvili (U.S.) beat Kristyna Pliskova (Czech Republic) 6-4 7-6(4)
Anett Kontaveit (Estonia) beat Lauren Davis (U.S.) 6-3 6-1
2-Johanna Konta (Britain) beat Victoria Duval (U.S.) 6-3 6-0
Pliskova hits stunning winner to take Nottingham title
Caroline Wozniacki wins in Nottingham on return from injury
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