The Polish star defeated Nigina Abduraimova, the world No. 181 from Uzbekistan, 6-4, 6-3 on Tuesday night to book a place in the Round of 16, public broadcaster TVP Sport reported.
Świątek next faces either America’s world no. 78 Claire Liu or China’s world no. 116 Yue Yuan, according to the WTA.
The BNP Paribas Warsaw Open, the country’s biggest tennis tournament, is played on an outdoor hard court this year.
Last year, France's Caroline Garcia triumphed in Warsaw on clay, eliminating Świątek in the quarterfinals.
The 2023 BNP Paribas Warsaw Open runs until July 30.
Świątek this month reached the quarterfinals of the Wimbledon Grand Slam tournament in London, where she succumbed to Ukraine’s former world No. 3 Elina Svitolina 5-7, 7-6, 2-6.
Last month, the Polish player won the French Open for the third time after defeating Karolína Muchová of the Czech Republic in the final to claim her 14th career singles title.
Świątek, coached by countryman Tomasz Wiktorowski, has topped the world rankings since April 4, 2022.
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Source: PAP, WTA, TVP Sport