Tennis Scoring Explained: Love, Deuce, and the Tiebreak

The short version

A tennis match is points, stacked into games, stacked into sets. You need four points to win a game (called love, 15, 30, 40, then game) unless the game reaches 40-40 — "deuce" — in which case you need to win by two clear points instead. You need six games to win a set, also by a two-game margin, unless the set reaches 6-6, in which case a tiebreak game decides it. And you need two sets to win most matches (three at the men's Grand Slam singles level). That's the whole skeleton. Everything else in this guide is detail on those four layers, plus the newer no-ad format some leagues use to skip the deuce-and-advantage back-and-forth, and a glossary of the terms that trip up newcomers first. It's fact-checked against the ITF Rules of Tennis — tennis's official rulebook, published by the International Tennis Federation — and USTA's own scoring resources.

The point sequence: love, 15, 30, 40, game

Within a single game, points aren't counted 1, 2, 3, 4. They're called out as:

Love — zero points
15 — one point
30 — two points
40 — three points
Game — four points, provided the server or receiver is ahead by at least two points

So a game that goes cleanly to one side reads "15-love, 30-love, 40-love, game" — four points won in a row with none conceded. The score is always announced server's-score-first, so "30-15" means the server has two points and the receiver has one.

Why 15-30-40 instead of 1-2-3-4 is genuinely not settled history. This is one of those questions where the honest answer is that nobody has a confirmed source, only competing theories that have circulated for a couple of centuries. The scoring terms trace back to medieval France — the earliest documented reference is a 1435 poem — but the specific reasoning behind "15, 30, 40" rather than an even progression has no single agreed-upon origin. One popular theory ties it to a clock face, with points worth 15 minutes each (which would make the "missing" fourth quarter 45, not 40 — a discrepancy nobody has fully explained). Another ties it to the dimensions of the old French court game jeu de paume, where players advanced toward the net in 15-foot increments. Tennis historians generally treat both as folklore rather than documented fact, so we're presenting them as competing theories, not settled history. The word "love" for zero is similarly murky — a common but unconfirmed theory links it to the French l'oeuf ("the egg," for its zero-like shape), though there's no solid documentation the French ever used that term for tennis scoring. Treat all of this as interesting, not authoritative.

Deuce and advantage

Deuce is the name for a tied score of 40-40. From deuce, the normal "win by two points" rule that applies to the whole game becomes explicit and repeatable:

Win the next point from deuce and you have advantage — announced as "ad-in" if the server won it, "ad-out" if the receiver did.
Win the point after that, while still holding advantage, and you win the game.
Lose the point while holding advantage, and the score returns to deuce.

That cycle — deuce, advantage, deuce, advantage — can repeat indefinitely in a standard-scored game. There's no cap; a game keeps going until one side wins two points in a row from a tied position. This is the single biggest reason a "quick" recreational match can turn into a marathon: a handful of long deuce games in a set adds real time without adding a single extra game to the score.

Games, sets, and the match

A set is won by the first player or team to reach six games, provided they're ahead by at least two games (6-4, for example). If the game score reaches 5-5, play continues to 6-5 or 5-6 and then, if needed, 7-5 — a two-game cushion is still required. If the set instead reaches 6-6, a tiebreak game is played to decide the set (see below), and the set score is then recorded as 7-6.

A match is won by taking a majority of sets. The two standard formats:

Best-of-three sets — win two sets and the match is over. This is the format used in almost all professional women's tour and Grand Slam singles matches, all professional doubles, and the overwhelming majority of recreational, league, and club play at every level.
Best-of-five sets — win three sets and the match is over. This format is reserved for men's Grand Slam singles matches (the Australian Open, French Open, Wimbledon, and US Open) and a handful of other high-profile men's events. It's rare outside that context specifically because of the time commitment — a best-of-five match can run well past four hours.

If you're playing or watching recreational or club-level tennis, assume best-of-three. Best-of-five is a professional men's Grand Slam thing you'll encounter as a spectator, not as a weekend player.

The tiebreak: when it triggers and how it's scored

The tiebreak exists to solve one problem: without it, a set tied at 6-6 could theoretically continue forever, since the "win by two games" rule has no ceiling. The tiebreak caps that.

When it triggers. A tiebreak is played whenever a set reaches 6 games all (6-6), under the standard tiebreak-set format used in essentially all modern tennis — recreational, club, college, and professional. (Advantage sets, which play out 6-6 indefinitely without a tiebreak, still exist in the ITF rulebook as an option event organizers can choose, but they're rare in practice today.)

How it's scored. Unlike a regular game, a tiebreak is scored with ordinary numbers — 1, 2, 3, and so on — rather than love/15/30/40. Per the ITF rules:

The player whose turn it is to serve starts the tiebreak by serving one point, from the deuce (right) side.
After that first point, serve switches, and each player serves two consecutive points at a time — one from the ad (left) side, one from the deuce side — alternating for the rest of the tiebreak.
Players change ends of the court every six total points played.
The first player or team to reach 7 points, with a lead of at least 2, wins the tiebreak — and the set, which is then recorded as 7-6. If the tiebreak reaches 6-6, it continues (8-6, 9-7, and so on) until someone leads by two.

The 10-point "match tiebreak" is a different, longer version used only for a deciding final set. Since 2022, all four Grand Slams (Australian Open, French Open, Wimbledon, and US Open) use a 10-point tiebreak — first to 10 points, win by 2 — specifically when the final, deciding set of a singles match reaches 6-6, replacing what used to be an advantage final set at some of those events. Every non-final set at those same tournaments still uses the standard 7-point tiebreak at 6-6. Outside the majors, many recreational leagues and some tour-level doubles matches use a 10-point match tiebreak in place of an entire third set (see the doubles section below) — a different use of the same longer format, worth checking before you assume how a deciding set will be settled.

No-ad scoring: a real, current alternative

No-ad ("no advantage") scoring removes the deuce-and-advantage cycle entirely: at 40-40, the very next point wins the game outright, no matter who's serving. On the deciding point, the receiver (or receiving team, in doubles) gets to choose which side — deuce or ad court — the serve will be returned from.

This isn't a fringe experiment. It's the standard format in several current, well-established settings:

NCAA college tennis. Division I men's and women's dual-match tennis has used no-ad scoring since 2016, specifically to keep matches shorter and more predictable for team-format events.
World TeamTennis (WTT). The professional team league uses no-ad scoring across every set it plays, including singles sets.
ATP and WTA tour-level doubles. No-ad scoring is standard in professional doubles (see below), paired with a match tiebreak instead of a third set.
Many recreational leagues and clubs, including some USTA league formats, which use no-ad specifically to keep court-time predictable when courts are booked back-to-back.

What it isn't: the standard for professional singles. ATP and WTA tour-level singles matches, and all four Grand Slams' singles events, still use traditional ad scoring with deuce and advantage. So the honest summary is that no-ad is a real, current, and fairly widespread format — but "which format applies" is still something you should confirm before a match rather than assume, because both are common depending on the setting.

Singles vs. doubles: what actually changes

The point-game-set-match skeleton is identical in singles and doubles — love/15/30/40/game, six games to a set, a tiebreak at 6-6. Two things genuinely differ:

At the professional tour level, doubles uses no-ad scoring plus a 10-point match tiebreak instead of a third set. Per the rules published for events like the Nitto ATP Finals, tour-level doubles matches are contested as two no-ad sets, and if the match is tied at one set apiece, the teams play a 10-point match tiebreak instead of a full deciding set. This is purely a professional/tour convention — recreational club doubles almost always uses the same regular ad-scoring, three-set format as recreational singles unless a specific league's rules say otherwise.
Serving and receiving order rotate through four players instead of two, which is a positioning rule rather than a scoring one — the actual point-counting doesn't change based on how many people are on court.

If you're playing recreational doubles at a public court or club, assume standard scoring (ad, best-of-three) applies exactly as it would in singles, unless the event you've entered is explicitly run under tour-style or league-specific rules.

The most confusing terms, explained

A handful of terms account for most of the confusion newcomers run into on court or watching on TV:

Deuce — a tied score of 40-40 in a game, requiring a two-point margin to win from there.
Advantage (ad) — the score right after either side wins a point from deuce; win the next point too and the game is over, lose it and the score returns to deuce.
Let — a point (most often a serve) that's stopped and replayed because of interference — classically, a served ball that clips the top of the net cord and still lands in the correct service box. Unlike pickleball, which eliminated the let-serve replay rule in 2021, tennis still replays a let serve rather than playing it live.
Ace — a legal serve that the receiver doesn't get a racket on at all, winning the point outright.
Fault / double fault — a fault is a missed serve attempt (into the net, wide, long, or otherwise illegal); a double fault is missing both serve attempts in a row, which hands the point to the receiver. Tennis gives you two serve attempts per point, unlike pickleball's single attempt.
Break point — any point which, if won by the receiving player or team, would win them the game (i.e., "break" the opponent's serve). A game where the receiver wins is a "break of serve," generally considered a bigger deal than winning your own service game, since serving is a built-in advantage.
Set point / match point — the same idea one level up: a point that, if won, would end the set or the match, respectively.
Unforced error — a point lost to a player's own mistake rather than good play by the opponent — a routine shot hit into the net or wide with no pressure forcing it. It's a judgment call by whoever's tracking stats, not an official rule term, but you'll hear it constantly in commentary.
Rally — the sequence of shots exchanged after the serve and return, before the point ends.

Where to go next

Scoring gets you through watching or playing your first match without asking someone to explain the number they just called. If you're just getting a racquet in your hand for the first time, our guide to choosing a tennis racquet walks through head size, weight, and grip without the sales pitch, and if you're still deciding whether tennis is the right racquet sport for you in the first place, our pickleball, padel, tennis, or badminton decision guide breaks the choice down by court availability, physical demand, and cost.

Sources

This guide is fact-checked against the current official rules published by the sport's governing bodies:

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