If you lose, you just lose like a man and go home. I would just squeeze him a little more. But I cannot lose my control because my best friend in a fight is the technique, and the more emotionally involved I am, the less technique I apply. It's all about keeping myself focused and going a little harder when I have a chance to pay him back. The condition you are talking about is the perfect understanding of what's happened and what's coming.
Nobody relaxes in a situation like that.
You just get things under control. Emotionally you keep yourself controlled, but your mind is very intense. A lot of things pass at the same time. You never relax. Yes, but the most important principle is to apply leverage.