It was Kristyna's first win over a top-five ranked player and she will go on to play fellow Czech Barbora Strycova in the quarter-finals.
The Russian five-times Grand Slam champion struggled for rhythm initially on the low-bouncing grasscourt at the Mallorca Open but picked up the pace to beat Viktoria Kuzmova 7-6(8), 6-0.
It's French Open time! The tennis world's only clay court Grand Slam begins on Sunday and the best of the best will battle it out.
IMAGES from Day 5 of the Wimbledon Championships at All England Lawn Tennis and Croquet Club on Friday.
Images from all the action from Day 1 of the Wimbledon on Monday.
A summary of sports events and sports persons, who made news on Friday.
Summary of sports events and persons who made news on Monday
List of French Open women's singles champions:
IMAGES from matches played at the Miami Masters in Key Biscayne, Florida
IMAGES from the matches played at the PNB Paribas Open at Indian Wells on Sunday
Images from Day 9 of the 2020 French Open at Roland Garros, in Paris, on Monday.
A summary of Thursday's play at the French Open.
Simona Halep became the first Romanian in 40 years to lift the French Open trophy at Roland Garros on Saturday.
The Scot lost 6-4, 6-4 to Richard Gasquet in his first singles match since January before saying he had turned down a wild card into the men's draw at the year's final Grand Slam.
A summary of sports events and persons who made news on Sunday
Bernard Tomic is set to sit out the Australian Open after Tennis Australia (TA) decided not to award him a wildcard to the main draw, the organisers said on Thursday.
India's Leander Paes and his German partner Alexander Zverev went down to the Spanish duo of Feliciano Lopez and Marc Lopez in a men's doubles first round match to bow out of the Cincinnati Open.
PHOTOS from day four of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Friday.
IMAGES of the all the action from Day 1 of the Australian Open played at Melbourne Park on Monday
Images from the Australian Open matches played at Melbourne Park on Wednesday.
A summary of sports events and sports persons, who made news on Wednesday
Summary of sports events and persons who made news on Tuesday
Former world number one Andy Murray withdrew from the Brisbane International with a hip problem on Tuesday, further putting in doubt the Briton's prospects of being fit in time for the Australian Open later this month.