Performance Lab
Use this page as a learning hub, not just an archive. Start with the article that matches your biggest question, then move into the relevant collection or product page once you understand what problem you are trying to solve.
Explore the swing analyzer collection or go straight to the STA 4.0 product page.
Need a more focused guide? Compare pressurizers vs new balls, see who should use a swing analyzer, or start with beginner gear advice.
Your Tennis 'Feel' Is Lying to You — Here's Wha...
Every tennis player trusts their feel. Serve speed, spin rate, swing velocity — the data consistently shows a 15–25% gap between what players perceive and what they actually produce.
Your Tennis 'Feel' Is Lying to You — Here's Wha...
Every tennis player trusts their feel. Serve speed, spin rate, swing velocity — the data consistently shows a 15–25% gap between what players perceive and what they actually produce.
Which Tennis Sensors Still Work in 2026? (Zepp,...
Between 2020 and 2021, every major plug-in tennis sensor was discontinued. This is the definitive 2026 guide: what died, what remains, and what data each surviving option actually captures.
Which Tennis Sensors Still Work in 2026? (Zepp,...
Between 2020 and 2021, every major plug-in tennis sensor was discontinued. This is the definitive 2026 guide: what died, what remains, and what data each surviving option actually captures.
Babolat Play App Is Shut Down. What Are Your Op...
On December 31, 2021, the Babolat Play app was shut down. Every Play racket sensor is now permanently inactive. This guide covers what happened and which tennis sensor still works...
Babolat Play App Is Shut Down. What Are Your Op...
On December 31, 2021, the Babolat Play app was shut down. Every Play racket sensor is now permanently inactive. This guide covers what happened and which tennis sensor still works...
Sony Smart Tennis Sensor Is Discontinued. Here'...
Sony terminated the Smart Tennis Sensor service on September 30, 2021. The hardware is inoperable. This guide covers what happened and which tennis sensor still works in 2026.
Sony Smart Tennis Sensor Is Discontinued. Here'...
Sony terminated the Smart Tennis Sensor service on September 30, 2021. The hardware is inoperable. This guide covers what happened and which tennis sensor still works in 2026.
Zepp Tennis Is Dead. Here's the Only Sensor Tha...
Between 2020 and 2021, every major plug-in tennis sensor was discontinued — Zepp, Sony, Babolat Play, Babolat POP, and HEAD. This guide covers what happened and which sensor still has...
Zepp Tennis Is Dead. Here's the Only Sensor Tha...
Between 2020 and 2021, every major plug-in tennis sensor was discontinued — Zepp, Sony, Babolat Play, Babolat POP, and HEAD. This guide covers what happened and which sensor still has...
Djokovic's Return Position: What Data Says Abou...
Most players crowd the baseline on return. Djokovic doesn't. Discover the data behind his deep return position — and why copying it could be the smartest tactical adjustment you make...
Djokovic's Return Position: What Data Says Abou...
Most players crowd the baseline on return. Djokovic doesn't. Discover the data behind his deep return position — and why copying it could be the smartest tactical adjustment you make...