Tennis Scoring Terms Explained: Love, 15, 30, 40 and the Words You Hear Courtside

Tennis rules · Scoring words · Updated 2026-09-08

Tennis keeps score in a private language. A game runs love, fifteen, thirty, forty, then deuce, then advantage, and a set can end with someone saying bagel. Most of that vocabulary is older than the modern game, and none of it is explained by the rule book, which only tells you what the words mean today rather than where they came from.

This page is about the language rather than the machinery. If you want the mechanics of how points build into games, games into sets and sets into a match, read how tennis scoring works first. What follows is why zero is called love, the leading theory behind 15, 30 and 40, how to say a score out loud in the right order, and a glossary of the terms a parent or a new player actually hears at the side of a court.

Love is zero, and there are two stories about why

The first explanation is the egg. In French, l'oeuf means the egg, and an egg looks like a written zero. The theory says English speakers picked up the French call for nothing, heard l'oeuf as love, and kept the sound after losing the meaning. It is a tidy story, and the shape of a zero really has attracted egg names in other sports: a batter dismissed without scoring in cricket has been said to get a duck's egg for well over a century. The weakness is that no early French source has been produced showing players calling out l'oeuf for a score of nothing.

The second explanation is the idiom. In English, love has carried the sense of nothing at stake for a very long time, in phrases like playing for love, meaning playing for no money, and neither for love nor money. Under this reading, a player on love has nothing, and the word arrived from ordinary speech rather than from French. The weakness here is the same as the egg theory's weakness: it is an argument from plausibility, not from a document that says so. Both explanations get repeated as fact all the time. Neither has ever been proved, and an honest answer to a child asking why is that nobody knows.

Why the points climb 15, 30 and 40

The most repeated explanation is a clock face. On this account, an early scorer tracked a game on a clock dial mounted where both players could see it, moving the hand a quarter turn for each point won: 15, then 30, then 45, then 60, which closed the hour and closed the game. It explains the odd jumps neatly, and it explains why the sequence stops at a full turn rather than running on. The main objection is one of dates. The quarter-hour scores appear in French sources as quinze, trente and quarante-cinq well before clock dials with hands that split the hour into readable quarters were ordinary objects, which suggests the clock may have been a later illustration of the scoring rather than its origin.

The step from 45 to 40 is easier to account for. Quarante-cinq is a mouthful to shout twenty times a game, and forty-five is not much better, so the shortened form stuck in speech and then in writing. Some tellings add a second reason: with 40 rather than 45 in place, the clock still has room for advantage at 50 before game at 60, which gives the deuce sequence somewhere to live on the dial. A rival theory drops the clock entirely and points at the old indoor game, where the server was said to move fifteen feet closer to the net after each point won, then fifteen more, then only ten, because a third full stride would have put him on top of the net. Take your pick. The rules record what the scores are called and have never explained why.

How to say a score out loud

1. Server's points first, always: Thirty fifteen means the server has 30 and the receiver has 15. Fifteen thirty means the opposite. This is the single convention that prevents most scoring arguments, and it holds whether an umpire is calling the score or the players are calling it themselves.
2. Say love, never zero: Thirty love, love fifteen, and at the very first point of a game, love all. Zero is correct arithmetic and wrong tennis, and it will make an experienced opponent ask you to repeat yourself.
3. Equal scores end in all: Fifteen all and thirty all, not fifteen fifteen. The same pattern runs up the ladder: four games all in a set, one set all in a match.
4. Forty all is deuce: At 40-40 the call is deuce, not forty all. After deuce the next point won is advantage, said with the player's name, or with the shorthand ad in when the server holds it and ad out when the receiver does. Lose the advantage and the score returns to deuce. The full sequence is in the guide to deuce and advantage.
5. Call the game score before you serve: In a match with no umpire, the server calls the game score out loud before the first point of each game and the point score before every point after that, loudly enough for the far baseline to hear. Doing it every single time is what keeps two people's records from drifting apart.
6. Announce the end of a game and of a set: Game, then the games total. An umpire would say game Smith, Smith leads three games to two, first set, and at the end of a set, game and first set Smith, six games to four. Club players usually compress it to the score alone, which is fine as long as it is said.
7. Tiebreak points are plain numbers: Inside a tiebreak the scores are just numbers, server's total first: three two, five four, seven five. A tiebreak won 7-5 is written into the set as 7-6, because the tiebreak counts as one game.

The score, in the order an umpire would say it. Tennis Score Keeper₊ is a rules engine rather than a tally counter, so it holds the score the way it is spoken: server first, love instead of zero, deuce at 40-40, advantage after that, and a tiebreak counted as one game. Unlimited undo runs back to the first point of the match, and optional per-point charting turns aces, double faults, winners and unforced errors into stats. It is coming to iPhone and Apple Watch. Learn more about Tennis Score Keeper₊.

The scoring glossary

One more habit is worth building early: say the score even when you are sure of it. Scoring disputes almost never start with someone cheating. They start with a game where nobody spoke, both players quietly kept a private count, and the two counts drifted. Calling love fifteen before you toss the ball costs a second and settles the question while there is still nothing to argue about, which matters most in self-officiated junior matches where there is no umpire to appeal to.

With the vocabulary in place, the rest of the system is small. Points build into games, games into sets and sets into a match, all of it laid out in how tennis scoring works. The one stretch that catches new scorers is what happens after 40-40, covered on its own in the guide to deuce, advantage and no-ad. And the game that settles a set at six games all has a serve rotation of its own, explained in tennis tiebreak rules.

Frequently asked questions

Why is zero called love in tennis?

Nobody knows for certain, and the two leading explanations compete. One says the French l'oeuf, meaning the egg, described the shape of a written zero and was heard by English speakers as love. The other says love already meant nothing at stake in ordinary English, as in playing for love, so a player on love simply has nothing. Neither has a contemporary document behind it.

Why does tennis score 15, 30, 40 instead of 1, 2, 3?

The most repeated explanation is a clock face, with the hand moved a quarter turn per point: 15, 30, 45, then 60 to close the game. The 45 shortened to 40 in speech because it is quicker to shout, and the shorter form stuck. A rival theory ties the numbers to the distances a server moved toward the net in the old indoor game. No source from the period confirms any of them.

What do ad in and ad out mean in tennis?

Ad in means the advantage belongs to the server, and ad out means it belongs to the receiver. They are shorthand for advantage, used in matches with no umpire because both players already know who is serving. Win the advantage point and you win the game; lose it and the score returns to deuce.

Do you say the server's score first in tennis?

Yes, the server's score always comes first. Thirty fifteen means the server has 30 points and the receiver has 15. In a match without an umpire the server also calls the game score before the first point of each game, then the point score before every point after that.

What is a bagel in tennis?

A bagel is slang for a set won 6-0, named after the shape of the zero. A set won 6-1 is sometimes called a breadstick, after the shape of the 1. Neither word appears in the rules, and neither changes how the set is recorded.

What is the difference between a forced error and an unforced error?

A forced error is a miss where the opponent's shot left no realistic chance of a clean reply, while an unforced error is a miss on a ball the player had time and balance to handle. The split is a judgment made by whoever is charting the match, not a rule, so two people watching the same point can disagree. Neither label affects the score.

What does let mean in tennis?

A let means the point is replayed with nothing scored. The common case is a serve that clips the net cord and still lands in the correct service box: it is taken again, and a let on a first serve gives you another first serve rather than a second. Lets can also be called when play is interrupted, for instance by a ball rolling onto the court.

Keep reading

• How Tennis Scoring Works: Points, Games, Sets and Matches Explained
• What Is Deuce in Tennis? Advantage, Ad In, Ad Out and No-Ad Scoring Explained
• Tennis Tiebreak Rules: The 7-Point Set Tiebreak and the 10-Point Match Tiebreak