Tennis has one of the most charming and confusing scoring systems in all of sport. Newcomers hear the umpire call out fifteen, thirty, and love, watch scores reset in ways that seem random, and wonder how anyone keeps track. In fact the system is perfectly logical once you learn its building blocks. Tennis is scored in a nested structure: points make up games, games make up sets, and sets decide the match. Learn each layer and the whole thing clicks into place.
Points: The Odd Numbers
The smallest unit is the point, and this is where the famous strange counting appears. Instead of one, two, three, tennis counts points as fifteen, thirty, and forty. The progression within a game goes:
- Love means zero. So a game starts at love-love.
- The first point won takes a player to fifteen.
- The second point takes them to thirty.
- The third point takes them to forty.
- Winning a fourth point wins the game, provided you are ahead by at least two points.
The server's score is always announced first. So a call of thirty-fifteen means the server has two points and the receiver has one.
Deuce and Advantage
Because you must win a game by two points, there is a special situation when both players reach forty. This is called deuce. From deuce, a player must win two points in a row to take the game. Winning the first point after deuce gives that player the advantage. If the player with advantage wins the next point, they win the game; if they lose it, the score returns to deuce. This can repeat many times, which is why some games stretch on dramatically.
Games and Sets
Winning individual games builds toward winning a set. To win a set, a player must win at least six games and be ahead by at least two. So a set can end six-four or seven-five. If the games reach six-all, most matches use a tiebreak to settle the set, which we will come to next. Players alternate serving from one game to the next throughout the set.
The Tiebreak
The tiebreak prevents sets from dragging on endlessly when games are tied at six each. In a tiebreak, scoring switches to ordinary numbers: one, two, three, and so on. The first player to reach seven points, while leading by at least two, wins the tiebreak and the set, which is recorded as seven-six. If the tiebreak itself reaches six-all, it continues until someone leads by two. Serving in a tiebreak rotates in a specific pattern between the players so it stays fair.
Winning the Match
Finally, sets add up to the match. Most matches are best of three sets, meaning the first player to win two sets wins overall. Some men's Grand Slam matches are best of five, requiring three sets to win. Formats vary by tournament, and the very last set sometimes has its own special rule for how a tiebreak works, but the core idea is the same everywhere.
Putting It All Together
Imagine a scoreline that reads six-four, three-six, seven-six. That tells a complete story: the first player won the opening set six games to four, lost the second set three games to six, and edged the deciding set seven-six, meaning it went to a tiebreak. Once you can read a line like that, you are no longer a spectator guessing at the numbers; you are following the match. The vocabulary of love, deuce, and advantage may be centuries old and delightfully eccentric, but underneath it lies a clear, fair ladder from a single point all the way to victory.