Baindl K. - Ostapenko J.

Sabalenka, Aryna - currently the best WTA player and most stable player, for almost a year now Arina has been taught stability, very good endurance, powerful serves and winners.
Potapova is a very good opponent, but cannot maintain the game's pace, lacks stability, and makes quite a few unforced errors in her serves.
The only downside is the three H2H matches, all won by Arina, with only one being a tiebreaker and Potapova not playing at all.
In any case, the level difference is significant.

Sabalenka, Aryna - currently the best player in the WTA rankings and the most stable one, for over half a year Aryna has been showing stability, great endurance, powerful serves and winners.
Potapova on the other hand is a very strong opponent, but she struggles to maintain the game pace, lacks stability, and makes quite a lot of unforced errors in her serves.
The only drawback is the three previous H2H matches, all in favor of Aryna, with one being a walkover as Potapova did not play at all.
In any case, there is a huge difference in class.