I think players tend to get anxious if they've not really done things properly - like eating, resting or training. If you're fully prepared you've got nothing to worry about - it's just a game of football.
“If you write fiction, you're by yourself. There are certain advantages to that in that you don't have to explain anything to anybody. But when you get in with others who share the loneliness of the whole enterprise, you're not lonely anymore.”