Coco Gauff’s serve has become one of the most discussed technical issues on the WTA Tour.

After hiring biomechanics expert Gavin MacMillan, the expectation was clear: identify the mechanical flaws and stabilize the serve.

But after the first months of the 2026 season, the numbers tell a different story.

103 double faults in just 14 matches.

Former world No.1 Kim Clijsters recently suggested that the problem may no longer be purely technical. In her view, the issue may have become mental — even obsessive.

And this situation reveals something that happens to thousands of players, not just professionals.

WHEN A TECHNICAL FIX TURNS INTO MENTAL NOISE

Every player has experienced it at some point.

You identify a technical issue.

Maybe your serve toss is inconsistent.
Maybe your forehand timing is off.

So you start working on it.

More repetitions.
More attention.
More focus.

At first, this seems logical.

But then something subtle happens.

Instead of improving the movement, your brain starts monitoring the movement.

And that’s where problems begin.

Because the brain cannot perform fluidly while constantly supervising itself.

AUTOMATION VS CONTROL

High-level performance depends on automation.

A serve at professional level happens in about 0.4 seconds from loading to contact.

There is no time for conscious control.

When a player begins to think about:

  • elbow position

  • toss height

  • shoulder rotation

  • wrist pronation

the movement becomes fragmented.

This creates hesitation.

And hesitation destroys rhythm.

The serve becomes slower, more cautious, and ironically less controllable.

THE OBSESSION TRAP

Clijsters’ word was interesting: obsession.

When a player becomes obsessed with fixing something, the brain shifts into error-detection mode.

Instead of executing the movement, the brain constantly scans for mistakes.

Every miss reinforces the belief that something is wrong.

That creates the classic loop:

miss → doubt → control → tension → miss again.

The more you try to fix it, the worse it becomes.

WHY THIS HAPPENS MORE ON THE SERVE

The serve is the most vulnerable shot mentally.

Why?

Because it is the only moment in tennis where:

  • the player is alone

  • the game stops

  • everyone is watching

  • there is time to think

And thinking is exactly what disrupts the serve.

THE REAL SOLUTION

Ironically, many serve problems are not solved by more thinking, but by less control.

Players often need to:

  • simplify cues

  • rebuild rhythm

  • reintroduce external focus

  • trust repetition again

Technique matters.

But over-analysis can destroy technique.

Sometimes the fastest way to fix a shot is to stop trying to fix it during competition.

Because performance and correction require two different mental modes.

And confusing them creates exactly the spiral Clijsters described.