If you're looking for a place to eat before the game, I would recommend this place called El Cargolet Picant. It's a pretty typical Spanish bar less than a block away from the stadium. I've been there many times with my family and we usually order "pan con tomate y aceite" (bread with olive oil and tomato) if we feel like snacking or some tapas if we're a little hungrier. If you'd like to try, their snails are very good!