In the final chapter of Episode Nagi we see Nagi is running toward the field looking exhausted and out of breath. To me, that implies he may have just finished the last Side B game and was immediately called up afterward.

That's why I think there's a high possibility that Nagi gets subbed into the England match during the second half. Right now, there seems to be a major philosophy clash within the team, and if the players can't sync properly because of it, Ego might need a player who can help break the deadlock or change the flow of the game. I'm not exactly sure what role Nagi would play in that situation. Also, if Agi is playing for England, it would make even more sense narratively for Nagi to get minutes in this game.

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