What is a Double Fault?

Few moments in tennis feel as deflating as watching a player toss the ball up, miss the serve twice in a row, and hand the point straight to their opponent without a single shot being returned. That’s a double fault, and it’s one of the few ways a player can lose a point in tennis without their opponent doing anything at all.

It sounds simple on the surface, but double faults actually reveal a lot about pressure, technique, and consistency at every level of the game. Here’s exactly what a double fault is and why it matters more than it might seem.

What Is a Double Fault, Exactly?

A double fault happens when a server misses both of their serve attempts on the same point. Every point in tennis gives the server two chances to get the ball in play — a first serve and, if that misses, a second serve. If the second serve also fails to land in the correct service box, the point is awarded automatically to the receiver, with no rally, no return, and no further play needed.

In other words, a double fault is entirely self-inflicted. The receiving player doesn’t have to do anything except stand and watch the point come to them.

What Counts as a Fault in the First Place?

To understand a double fault, it helps to know what counts as a single fault. A serve is considered a fault if:

• The ball lands outside the correct service box
• The ball hits the net and doesn’t land in the correct box (unless it’s a let, which is a separate rule)
• The server foot-faults, meaning their foot touches or crosses the baseline before contact
• The server misses the ball entirely while attempting to serve

Any one of these situations on a first serve simply gives the server a second attempt. It’s only when the same thing happens again on the second serve that it officially becomes a double fault, and the point is lost.

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Why Double Faults Happen More Often Under Pressure

Double faults aren’t just a beginner’s problem — they show up at every level of tennis, including among top professionals. That’s because serving, especially on big points, involves a delicate balance between power and precision, and pressure has a well-documented way of disrupting that balance.

A player who’s nervous or tight late in a close set might rush their toss, tense up their arm, or overcompensate after missing a first serve, leading to a second serve that misses as well. This is part of why double faults tend to spike during high-pressure moments like break points, set points, or match points, even for players who serve reliably throughout the rest of a match.

Double Fault vs. Ace: Two Opposite Extremes

It’s worth pointing out how differently a double fault and an ace are viewed, even though both decide a point without a rally.

• An ace is a serve so well-placed or powerful that the receiver can’t even get their racket on it, and it’s considered a strong, aggressive result for the server.
• A double fault is essentially the opposite outcome, a point lost purely due to the server’s own mistake, with no involvement from the opponent at all.

Commentators and stat trackers often compare a player’s ace count to their double fault count as a simple way of measuring how well they’re serving on a given day, since a high ace count paired with a low double fault count usually reflects a server who’s both aggressive and in control.

Does a Double Fault Affect More Than Just the Score?

Beyond the immediate point lost, double faults can carry a psychological weight that extends beyond that single moment. A double fault at a critical juncture, like on break point or set point, can shift momentum noticeably, sometimes rattling the server’s confidence heading into their next service game.

This is why you’ll often hear commentators specifically call out a poorly timed double fault, not just because of the point itself, but because of how it can affect a player’s rhythm and mindset for the rest of the match.

How Often Do Double Faults Happen at the Professional Level?

Even elite professional players double fault regularly, though the frequency varies a lot depending on playing style. Big, powerful servers who rely on high first-serve speed sometimes accept a slightly higher double fault rate as a tradeoff for more free points on aces and unreturnable serves. More conservative servers, who prioritize consistency over raw power, tend to keep their double fault numbers lower, even if their first serves aren’t quite as overwhelming.

Neither approach is inherently better — it often comes down to a player’s overall game plan and what kind of serve best supports their strengths in the rest of the match.

Simple Example of Double Fault

Imagine a player tosses the ball for their first serve, and it sails long, landing past the service box. That’s a standard fault, so they get a second attempt. On the second serve, they try to add some extra spin to keep it safely in the box, but this time the ball clips the net and drops into the wrong side. Since this is the second miss on the same point, it’s a double fault, and the point goes automatically to the receiver.

Frequently Asked Questions

What happens when a player double faults in tennis?
The point is automatically awarded to the receiving player, since the server failed to land either their first or second serve attempt in the correct service box.

Is a double fault the same as a regular fault?
No. A single fault just means the server gets a second attempt. A double fault only happens when both the first and second serve attempts fail, resulting in an automatic point loss.

Why do professional players still double fault?
Serving involves a difficult balance between power and precision, and pressure situations like break points or set points can disrupt that balance, even for highly skilled and experienced players.

What is the difference between a double fault and an ace?
An ace is an unreturnable serve that wins the point for the server, while a double fault is the opposite, a point automatically lost due to the server missing both serve attempts.

Do double faults count against a player’s overall statistics?
Yes. Double fault counts are commonly tracked alongside stats like aces and first-serve percentage, giving a broader picture of a player’s serving consistency and reliability throughout a match.