Liquipedia, all matches were Bo2.
For me, Bo2 is more difficult to predict than Bo3 which is easier to predict. But still I will bet more often on the total kill option or match duration or on other unusual options.
Anyways, this first match that will take place on the 10th but I'm a little interested and can't wait for the Falcon vs TS match. I'm sure this will be an interesting match and it will take a little longer to complete each map. And the temporary prediction for Falcon vs TS map 1 total kills over 42.5