From Xfire: “Dota Pro Circuit 2021 features 16 teams per region. Eight of these teams will play in the Upper Division and the other eight in the Lower Division. Some of these competitors are already known. The other will be decided in the next four days, via qualifiers. Lets take a look at these tournaments and their favorites.”
Source: N4G PC Dota Pro Circuit 2021 Qualifiers Preview: Europe and CIS