I guess the obvious candidate for the most important ball in a game of one-pocket is the ball you shoot in to win the game. But what's the next most significant ball in the game? Consider a game where you need a bunch of balls, say 5, 6 or 7, and your opponent needs just a single ball. In such a game, if you can force your opponent to take an intentional foul or if your opponent commits a table scratch or other foul, the difference between their needing a single ball and needing TWO is huge! For me, that's the second "biggest ball" in the game, the second ball they now need. Your chances of making a comeback just zoomed upwards from an extreme long-shot to just improbable. Now a mistake on your part doesn't necessarily end the game and you are operating under less intense pressure. In a game I had a couple of weeks ago, at one point my opponent needed just one ball while I needed five. At the end of the game, my opponent needed three balls! I guess the reason for this post is to encourage novice one-pocket players to not give up when their opponent is just a ball away from victory and they still need several balls. There are lots of turns and twists possible in a one-pocket end game and if you can hang in for a while, your opponent may stumble, commit a foul, and suddenly needed twice the balls they did a moment ago.