As long as a match consists of a single game, there is no reason to use a doubling cube. What you may be overlooking is that it is rare in real life to play backgammon for just one point. In tournaments, matches are played for a set number of points, which can be any number from 2 to 25 or even more. So, if you are playing an 11 point match, the first player to score 11 points wins the match. Each game starts with a value of 1 point, and the simplest case is that the winner of the game gets 1 point. A gammon is worth 2 points, however, and a backgammon is worth 3. Finally, if the game has been doubled one or more times, the winner's points are multiplied by the current "value of the cube", i.e., 2 if it has been doubled once, 4 if twice, etc. It's quite possible to play an 11 point match in 1 game in this way; alternatively, an 11 point match could last as many as 21 games!