Matchday turns real football's biggest fixtures into shared events inside PES 2021. Players choose a side in a themed matchup, play matches that feed a collective contest, and earn rewards tied to how their side performs across the whole event, not only in their own games.
The mode rewards preparation differently from ranked play: familiarity with the event teams, sensible scheduling around the event window, and squads built for the fixture's theme all matter before a ball is kicked.
For the broader online picture, the PES 2021 events guide multiplayer overview covers the surrounding modes; this guide stays with Matchday itself.

