After her victory, the Polish tennis star said to fans: "I wanted to, at the end, say something to Ukraine. Stay strong, because the war is still there."
The Polish world No. 1, who celebrated her 21st birthday earlier this week, extended her winning streak to 35 matches.
The Polish player last month won the Italian Open clay-court tournament in Rome, defending her crown and claiming her eighth career singles title.
The 21-year-old, coached by countryman Tomasz Wiktorowski, in early April took over as the new number one in women's tennis, becoming the first Pole to top the world rankings.
Świątek picked up her first Grand Slam title when she defeated American Sofia Kenin 6-4, 6-1 at Roland Garros in 2020.