Sabalenka defeated top-seeded Swiatek in two hours and twenty-six minutes to win Madrid for the second time.
The 20-year-old Spaniard is the youngest player to successfully defend an ATP Masters 1000 title since Rafael Nadal at Monte-Carlo and Rome in 2005–2006.
After an hour and 14 minutes, the 26-year-old, who won his first ATP Masters 1000 trophy in Cincinnati last year, earned a service break in his second return game.
Aryna Sabalenka vs Maria Sakkari will take place in the quarter-finals of the 2023 Madrid Open on May 4.
Aslan Karatsev vs Zhang Zhizhen will take place in the quarter-finals of the 2023 Madrid Open on May 4.
Daniel Altmaier vs Borna Coric will take place in the quarter-finals of the 2023 Madrid Open on May 3.
Jessica Pegula vs Veronika Kudermetova will take place in the quarter-finals of the 2023 Madrid Open on May 3.
Maria Sakkari vs Irina-Camelia Begu will take place in the quarter-finals of the 2023 Madrid Open on May 2.
Alejandro Davidovich Fokina vs Borna Coric will take place in the round of 16 of the 2023 WTA Madrid Open on May 1.
Jessica Pegula vs Martina Trevisan will take place in the round of 16 of the 2023 WTA Madrid Open on May 1.