Tennis

The scoring system may be confusing.

An excerpt from the article 29 facts about tennis
The points are counted as follows:
  • 0 points-love
  • 1 point-15
  • 2 points-30
  • 3 points-40

The game is won by a two-point lead. There are six games in one set, and at least two sets in a match.

In the tie-break, each point counts not as 15, but as one.