How Pro Tennis Works
Professional tennis runs nearly year-round on two tours—the ATP (men) and the WTA (women)—built around four marquee tournaments called the Grand Slams, or majors. Unlike league sports, there are no teams, no fixed schedule of matchups, and no playoffs: every tournament is a knockout bracket, and the season’s rhythm comes from the calendar of surfaces and majors.
A few terms before we start
- Game: the smallest unit—one player serves for the whole game, and points run 15, 30, 40, game.
- Set: first to 6 games, win by 2. Matches are best of 3 sets (or best of 5 for men at majors).
- Hold: winning a game on your own serve—the expected outcome, since serving is a big advantage.
- Break: winning a game on your opponent’s serve. Breaks are the pivotal moments—typically one break decides a set.
- Tiebreak: a first-to-7 sudden-death game played when a set reaches 6-6 (details below).
- Seed: a ranking-based bracket position that keeps top players apart until late rounds.
The Four Majors
The Grand Slams are the biggest events in the sport—two-week, 128-player draws, the most ranking points, the most prize money, and the matches players build their whole seasons around. They’re also the only tournaments where the men play best of 5 sets; everywhere else, both tours play best of 3.
Australian Open—Melbourne, January. Hard courts. The season’s first major, famous for brutal summer heat.
Roland Garros (French Open)—Paris, typically late May into early June. The only major on clay, and the most physically grinding.
Wimbledon—London, typically late June into mid-July. The oldest tournament in the sport and the only major on grass. All-white dress code, strawberries, royal box.
US Open—New York, typically late August into early September. Hard courts, night sessions, the loudest crowds of the year.
Between the majors, the tours run one-week and ten-day events (the ATP’s Masters 1000s and the WTA’s 1000-level events are the biggest). They matter for rankings, but the majors are where legacies are made—“how many Slams?” is the first line of any all-time-great debate.
Scoring: Points, Games, Sets
Points in a game run 15, 30, 40, game. At 40-40 (“deuce”), a player must win two points in a row—the first gives them “advantage,” the second wins the game. One player serves for an entire game, then serve passes to the opponent, alternating every game for the whole match.
Serving is a big edge—top pros typically win 70-90% of their service games. That’s why breaks of serve are the hinge moments of a match: a single break is often the only difference in a 6-4 set. A player who is “broken” needs to break back or the set is effectively gone.
Sets go to the first player to win 6 games with a 2-game cushion: 6-4 and 7-5 are complete sets, 6-5 is not. If a set reaches 6-6, it goes to a tiebreak.
Tiebreaks—and the Final-Set Rule
A standard tiebreak is played at 6-6: first to 7 points, win by 2, with players alternating serve every two points. The tiebreak winner takes the set 7-6. Tiebreaks are sudden-death tension by design—a whole set condensed into a few minutes, where one loose point can decide it.
The wrinkle is the final set—the deciding set when the match is even (the 3rd of a best-of-3, the 5th of a best-of-5). For decades each major had its own rule here, which produced some famous marathons: Wimbledon had no final-set tiebreak at all until 2019, which is how John Isner and Nicolas Mahut ended up playing a 70-68 fifth set over three days in 2010.
All four majors (since 2022): at 6-6 in the final set, a 10-point tiebreak—first to 10, win by 2. One unified rule replaced four different ones.
Regular tour events: the standard 7-point tiebreak applies in every set, including the decider.
Doubles (tour events): typically no-ad scoring (sudden-death point at deuce) and a 10-point match tiebreak played in place of a third set.
A 10-point final-set tiebreak at a major is about as tense as the sport gets—a whole match riding on a race to 10. SportRec’s excitement ratings weight tiebreaks heavily, and a deciding-set tiebreak most of all.
Surfaces: Hard, Clay, Grass
Tennis is the rare sport where the playing surface changes the game itself. The season moves through distinct “swings”—hard courts to start the year, clay in the spring, grass in early summer, then back to hard courts.
Hard (Australian Open, US Open, most tour events)—medium-fast pace, true bounce. The most neutral surface: big servers and baseline grinders both have a chance, so it rewards the most complete players.
Clay (Roland Garros)—slow, with a high bounce that gives players time to chase everything down. Rallies get long, serves matter less, and points are won by patience, topspin, and legs. Players slide into shots. Rafael Nadal won Roland Garros 14 times—surface specialization at its most extreme.
Grass (Wimbledon)—fast and slick, with a low, skidding bounce. Big serves and short points rule; returners get almost no time. The grass season lasts only a few weeks, so specialists are rare and upsets are common.
Surface is worth checking before you watch: the same two players can produce a serve-dominated sprint on grass and a three-hour war of attrition on clay.
Line Calls: From Challenges to Full Automation
For most of the 2010s, close calls worked like this: human line judges made the call, and each player got a limited number of challenges (typically three per set) to send a call to Hawk-Eye, a camera system that reconstructs the ball’s bounce. The crowd clap-along while the replay animated on the big screen became one of the sport’s signature rituals.
That era is mostly over. The tours have moved to live electronic line calling—the camera system makes every call automatically, in real time, with no line judges on court. The ATP adopted it tour-wide in 2025; the Australian Open has used it since 2021, the US Open since 2022, and Wimbledon retired its line judges in 2025 after nearly 150 years. With the machine making every call instantly, there’s nothing left to challenge, so challenges are gone at those events too.
The holdout is clay. Roland Garros has typically kept human line judges, because clay offers something no other surface does: the ball leaves a physical mark, and the chair umpire climbs down to inspect it. Tradition and evidence in one gesture.
How SportRec Covers Tennis
SportRec scores every ATP and WTA match—majors and regular tour stops—on the same spoiler-free 0-100 excitement scale as every other sport. Ratings reward tight sets, tiebreaks (especially deciding-set tiebreaks), comebacks from a set down, and matches that go the distance. Use the filter menu to narrow the slate to Grand Slams only, or to singles or doubles.