Sabalenka won, because Anisimova couldn't keep her cool and the unforced errors killed her during this games, I've never seen Sabalenka broken so many times in a single straight game and still win the match, big props to her though, she was very focused today, made the least unforced errors that I've ever seen her made.
Watched the whole match and Anisimova was unplayable in moments when her game clicked, unfortunately those moments were very sparse yesterday. You could see it coming as well, she would play a great point, shots start going in and she wins 2 or 3 games in a row. Then bad point happens and she is throwing unforced errors left and right.