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.
“I think what is British about me is my feelings and awareness of others and their situations. English people are always known to be well mannered and cold but we are not cold - we don't interfere in your situation. If we are heartbroken, we don't scream in your face with tears - we go home and cry o”