A tennis Grand Slam is one of the four biggest events in the sport: the Australian Open, Roland Garros, Wimbledon and the US Open. Win any one of them and you are a major champion.

The same phrase pulls double duty, because winning all four in the same calendar year is also called a Grand Slam, and that version has only happened a handful of times in more than a century.

So the word covers two things at once:the events themselves and the rarest achievement going. That overlap is what trips most people up, so here is how the two meanings fit together.

For Australian fans it all kicks off at home. The Australian Open in Melbourne is the first major of every season in January, before the circuit heads to Paris, then London, then New York.

What “Grand Slam” actually means

Two definitions sit behind the one term, and they get used interchangeably.

The first is the simplest. The Grand Slams are the four majors, the most important tournaments on the calendar. They carry the most ranking points, the biggest prize money and the deepest fields, so every top player turns up.

Lift one trophy and you have won “a slam,” which is how commentators and players talk about it day to day.

The second meaning is the original one. Winning all four majors in the same calendar year is the actual Grand Slam, the achievement the term was coined for back in the 1930s.

That is a different beast entirely, because it asks one player to peak across hard court, clay and grass over roughly eight months without a single slip at the business end.

The phrase itself was borrowed from card games. A New York columnist reached for it in 1933 to describe a player chasing all four titles in one season, lifting “grand slam” straight out of bridge, and the name stuck.

The four events had only been grouped together as a set in the 1920s, so the idea of a clean sweep gave them a shared headline goal and a bit of mythology to chase.

Most of the time, when someone says a player “won a slam,” they mean a single major. When they say someone “won the Grand Slam,” they mean all four in a year. Same words, very different feats.

The four Grand Slam tournaments

Each major has its own surface, its own quirks and its own slot in the season. They run in the same order every year, so the calendar reads like a tour of four very different tennis challenges.

Australian Open

First up every year is the men's Australian Open outright favourite's hunt, played at Melbourne Park across the back half of January. It sits on a blue acrylic hard court, which gives a true, fairly quick bounce that rewards big serving and clean ball-striking.

The summer heat in Melbourne can be savage, so fitness matters as much as form. It picked up the nickname the “Happy Slam” because players tend to love the relaxed feel and the local crowds, and for Aussie fans it is the one major in our own backyard.

It only took its modern shape in 1988, when the tournament moved from grass at the old Kooyong site to the purpose-built courts at Melbourne Park and switched to a hard surface.

Three of its main arenas now sit under retractable roofs, so the brutal January heat and the odd summer storm rarely stop play for long.

Roland Garros (French Open)

Next comes Roland Garros odds territory, better known here as the French Open, played in Paris from late May into June. It is the only major on red clay, the slowest surface in the game, so rallies stretch out and points are won through patience and heavy topspin rather than quick finishes.

It is the most physically punishing fortnight on tour, which is why clay specialists thrive and why Rafael Nadal could win it 14 times and earn the title King of Clay.

Best-of-five tennis on clay can stretch into four and five hour marathons. The 2025 final between Carlos Alcaraz and Jannik Sinner ran the longest in the tournament’s history, with Alcaraz somehow climbing out from two sets and championship points down to win it.

Court Philippe-Chatrier finally got a roof in 2020, so the long rain delays that used to define Paris are mostly a thing of the past.

Wimbledon

Then the tour swings to Wimbledon in London, played on grass at the All England Club through late June and early July.

It is the oldest tennis tournament in the world, first held in 1877, and the only major still played on grass. The surface is fast and low, so the points are short and the serve is a weapon.

Wimbledon keeps its traditions tight, including the all-white dress code, and many in the sport still rate it the most prestigious title of the lot.

The grass itself changes through the fortnight, slick and green in the first week before it wears down to bare dirt along the baselines by the second.

Around the tennis sits the ritual that makes it feel different to anywhere else, the queue for day tickets, the strawberries and cream, and a Centre Court roof that keeps the showpiece matches running well after dark.

US Open

The season closes at the US Open in New York, played on hard courts at Flushing Meadows across late August and into September.

It is the loudest and most theatrical of the four, with packed night sessions under lights and a crowd that feeds off the drama. The hard court plays a touch quicker than Melbourne, and the late-summer humidity adds another layer to an already brutal fortnight.

Arthur Ashe Stadium is the largest tennis arena in the world and the centre of all that night-session noise.

The US Open was also the first major to settle a deciding set with a tie-break rather than letting it run on indefinitely, so its closing sets have a hard finish line that the other majors took decades to adopt.

Put together, the four cover every surface tennis is played on:

• Australian Open, Melbourne, January, hard court
• Roland Garros, Paris, late May into June, clay
• Wimbledon, London, late June into July, grass
• US Open, New York, late August into September, hard court

Why the majors outweigh every other tournament

The majors are not just bigger versions of a normal event. They are built differently, and that is what sets them apart.

They hand out the most ranking points, 2,000 to the singles champion, which is double what the next tier of events offers.

They carry the largest prize money in the sport. And on the men’s side they are the only tournaments played best of five sets, so a contender has to win three sets in a single match rather than two, which turns every round into a test of stamina as well as skill.

The women play best of three at every level, majors included.

There is the history too. A career gets measured in majors first and everything else second, so when players talk about their legacy, the slam count is the number that matters.

That is why the whole tour points toward these four fortnights, and why the betting and viewing interest around them dwarfs the rest of the season.

A major is also a longer grind than anything else on tour. The singles draw holds 128 players, so a champion has to win seven matches across two weeks to lift the trophy.

Seedings keep the top names apart in the early rounds, but the depth of the field means the contenders still get a proper test well before the second week, and on the men’s side those late matches stretch to five sets.

Calendar Slam, Career Slam and Golden Slam

This is where the term splinters into a few different achievements, and they are easy to mix up.

Calendar Grand Slam

Winning all four majors in the same calendar year is the calendar Grand Slam, and it is the hardest thing to do in tennis.

In the Open Era, which began in 1968, exactly three players have managed it: Rod Laver in 1969, Australia’s own Margaret Court in 1970, and Steffi Graf in 1988.

No man has done it since Laver more than 50 years ago, which tells you how rare the feat really is across hard court, clay and grass in one season.

The surface switch is what makes it so brutal, since a player has to win on clay, grass and hard court inside a few months, three games that reward almost opposite styles. Plenty have come close without sealing it.

Novak Djokovic held all four titles at once across 2015 and 2016, then reached every final in 2021 and won three before falling at the last hurdle in New York. Serena Williams did much the same in 2015.

Taking three of the four in a year, the so-called three-quarter slam, is itself a career-defining season, which is the clearest sign of just how far the full sweep sits beyond almost everyone.

Career Grand Slam

A career Grand Slam means winning each of the four majors at least once, just not in the same year. It is still elite company, but far more attainable across a long career.

On the men’s side the Open Era club is Andre Agassi, Roger Federer, Rafael Nadal, Novak Djokovic and, most recently, Carlos Alcaraz , who completed his set at the 2026 Australian Open to become the youngest man ever to do it.

The women’s list runs deeper and includes Serena Williams, Graf, Court, Martina Navratilova and Chris Evert.

Golden Slam

Add an Olympic gold medal to all four majors in the same calendar year and you have a Golden Slam, the rarest line on any tennis CV.

Only one singles player has ever pulled it off: Steffi Graf in 1988, when she swept the four majors and won gold in Seoul.

Several greats have managed a career Golden Slam, collecting the four majors and an Olympic gold at different points, Djokovic among them after his win in Paris in 2024, but Graf’s clean sweep in a single year still stands alone.

Is there a fifth Grand Slam?

No. There are four, and that has not changed. The confusion usually comes from two places.

The first is the season-ending Tour Finals, the event that brings together the top eight players of the year. It is a huge title and a fitting cap to the season, but it is not a major and does not count toward a slam tally.

The second is a newer wave of big-money invitation events. Exhibitions like the Six Kings Slam borrow the language and stack the field with stars, but they award no ranking points and sit outside the official majors. They are showpieces, not slams. The four that count are fixed: Melbourne, Paris, London and New York.

Frequently asked questions

How many Grand Slams are there in tennis?

Four. The Australian Open, Roland Garros (the French Open), Wimbledon and the US Open, in that order each year.

What are the four tennis Grand Slams?

The Australian Open on hard court in January, Roland Garros on clay in late May and June, Wimbledon on grass across late June and July, and the US Open on hard court in late August and September.

Has anyone won all four majors in one year?

Yes, but rarely. In the Open Era only Rod Laver (1969), Margaret Court (1970) and Steffi Graf (1988) have completed a calendar Grand Slam. No man has done it since Laver.

What is the difference between a calendar and career Grand Slam?

A calendar Grand Slam is all four majors in the same year, which is the original and far rarer feat. A career Grand Slam is winning each of the four at least once over a whole career.

Which Grand Slam is the hardest to win?

It comes down to the surface that suits you. Roland Garros is the most physically demanding because of the long clay rallies, and historically the toughest for anyone who is not a natural clay-courter. Wimbledon’s fast grass asks for a completely different game again. The fair answer is that the hardest major is whichever one sits furthest from your best surface.

Is the Australian Open a Grand Slam?

Yes. The Australian Open is one of the four majors and the first Grand Slam of every tennis season.