Justin Van Malderen from Luxilon is back on the Functional Tennis Podcast.

At the 2025 US Open, 55% of the Top 100 were using Luxilon strings. In this episode, we discuss why.

We talk about falling string tensions on tour, how modern powerful rackets are changing string demands, and why today’s aggressive baseline game requires more durability and control than ever.

We also dive into why I chose Luxilon Element for the FT99 racket, how it compares to 4G and Alu Power, and who it’s best suited for.

Justin shares insight into Sabalenka’s unique setup, the reality of sustainable strings, and how Luxilon competes as a family business in a market dominated by major global brands.

Plus, Justin is offering a €500 Functional Tennis voucher to one listener who fills out Luxilon’s string questionnaire. Tap here to fill it out and the last submission date is on March 31st.

If you care about your setup and want to understand what makes a difference at the highest level, this one’s for you.

Enjoy

Fabio

In this episode of the Functional Tennis Podcast, I’m joined by Yuhi Tanigaki, Product Manager for Tennis Footwear at ASICS, to go behind the scenes of the new Solution Speed FF4.

Yuhi plays a central role in shaping ASICS tennis shoes, working closely with designers, researchers, professional athletes, and recreational players to turn feedback into real on court performance.

We cover what actually goes into building a modern tennis shoe and how small changes can make a big difference.

In this episode, we discuss:

1. How long it really takes to develop a tennis shoe from first idea to retail
2. What stayed consistent from the original Solution Speed and what has evolved
3. The key updates in the Solution Speed FF4 and how they affect feel and movement
4. How ASICS balances speed, comfort, and durability without adding weight
5. The role of athlete feedback, including insights from Belinda Bencic
6. Differences between what professional players and recreational players value
7. Why ASICS sees the FF4 as an evolution rather than a complete redesign
8. Which type of player the Solution Speed FF4 is built for

This episode is a deep dive into tennis footwear design and a rare look at how performance products are actually created behind the scenes.

A brief catchup with whats been going on at Functional Tennis

1. Podcast break
2. New Saber Editions
3. The FT99
4. New 2027 products
5. Tariff complications
6. Podcast guests