Świątek on Saturday beat Belarusian Aryna Sabalenka 7-4, 4-6, 7-6 to win the Madrid Open clay-court tournament in Spain, claiming her 20th career singles title.
Świątek in February won the Qatar Open tournament in Doha for the third consecutive time. In March, she triumphed at the BNP Paribas Open tournament at Indian Wells, California.
The Polish star in November regained her spot at the top of the world rankings in women's tennis after winning the season-ending WTA Finals tournament in Mexico.
She now leads the WTA rankings with 10,910 points, ahead of Sabalenka, with 7,498 points, and American Coco Gauff, with 7,313.
The second-highest ranked Polish female player, Magda Linette, moved down three spots to No. 51 in the latest WTA rankings.
Meanwhile, countrywoman Magdalena Fręch slipped from 51st to 55th place in the new world rankings, which were released on Monday.
(gs)
Source: IAR, PAP, polskieradio24.pl
Click on the audio player above for a report by Radio Poland's Marcin Matuszewski.