PES 2010 focuses on enhancing the excitement of matches between players, making for a truly challenging experience that will constantly test the player. Intuitive zonal defending will cover spaces and players need to look constantly for new ways to attack. PES 2010 focuses on being a real football simulation, as it requires both strategic play and quick reactions, as in real life. In addition to key out-field elements, goalkeepers are more versatile and with abilities matching those of modern shot-stoppers. The game's referees have also been reworked, with smarter AI elements allowing them to make more balanced calls during matches.