Wrestling teaches you that tired and beaten are different things. The kid across from you is breathing hard too.

Tiredness is a state and being beaten is a decision, and in the middle of a hard match the two feel identical. The useful piece of information is that the person opposite is in much the same condition, because the work has been shared out evenly. Most contests get decided after both people have run out, not before.

Next time you are empty and still in it, look up at your opponent before you concede anything. Notice the breathing, the posture, how slowly they get set. Then do one more thing properly, because at that point one more is usually all it takes.