Pro Evolution Soccer 2010 features numerous innovations in gameplay and realism. Every single aspect of the game benefits from essential improvements, with fundamental gameplay advancements to create a new degree of realism. PES 2010 focuses on being a real football simulation, as it requires both strategic play and quick reactions, just like real life. New zonal defending intuitively covers spaces, meaning players constantly need to look for new ways to attack. The game's referees have also been reworked, with smarter AI elements allowing them to make more balanced calls.