Tennis scoring system.
So you have played tennis, or at least watch it on TV and you have realized that the score does not rise to a point every time.
If you are not familiar with the tennis grading system, this is a brief explanation: the first player won four points to win a game, if the player won four straight points, their scores will
Well, there is no solid reason why the score increases as they are medieval and French roots.
The only reliable explanation is the point system based on the number of minutes in an hour.
Back to the fifteenth century, every turn had four winning rally worth 15 points each point.
It is noticed that when both parties are at 45 points each point, they need to win two protests if no game can be decided by luck.
Doing this means that the total will be more than 60 points, this will disrupt in some minutes in an idea an hour.
Therefore, the score then has been changed to 40 - all and 10 points have been given for each protest win.
If there is a binding at 50 points, the score will return to 40 all.
Therefore, you can only defeat the opponent by winning two consecutive protests.
The term "deuce" comes from France's "Deux", meaning the two consecutive points need to win.