The Polish world No. 2 defeated the 27th-seeded Belgian 7-6, 6-1 in the round of 32 on Sunday.
Świątek will now face Ukrainian Elina Svitolina, the 22nd seed, for a place in the quarterfinals of the women’s singles competition at this year's Miami Open.
Poland’s 34th-ranked Magda Linette has also made it through to the last 16 of the Miami Open, with a 7-5, 6-4 victory over the Czech Republic's Linda Fruhvirtová.
She will next take on American Coco Gauff on Monday.
Meanwhile, Poland's world No. 27 Magdalena Fręch made an early exit from the Miami Open after losing 4-6, 4-6 to Romanian Elena-Gabriela Ruse in the second round.
The 2025 Miami Open runs until March 30.
(gs)
Source: IAR, PAP