Best for advanced players who want attack and control in one racket
Advanced to professional players who want one racket for both attacking and controlled play get the most from this racket. The hybrid shape and medium high balance let a player finish points with real pace while still holding a reasonably wide hitting area for defense. A player who wants a dedicated defensive racket with maximum forgiveness is better served by a fully round, lower balanced racket, and a player still building consistent technique should look at a softer, more forgiving frame.
Specifications
- Shape
- Hybrid
- Weight
- 355–375 g
- Touch
- Medium Hard
- Balance
- Medium High
- Core
- EVA
- Faces
- 15K Carbon
- Frame
- Carbon
- Level
- Advanced
Overview of the Siux Electra Stupa Pro ST4 2025 (Franco Stupaczuk)
The Siux Electra Stupa Pro ST4 2025 is Franco Stupaczuk's signature racket in Siux's Electra range, built on a hybrid shape between round and diamond, with 15K Carbon faces on a medium high balance. It sits at the top of the Electra Stupa family alongside lighter and simpler ST3 variants, positioned as a versatile racket that leans toward attack without giving up as much control as a full diamond, head heavy frame would.
Pros & Cons
Pros
- Hybrid shape and 15K Carbon faces deliver real attacking pace without a full diamond racket's sharp defensive trade off.
- Net play and smash both carry genuine conviction.
- Sanded surface finish adds real bite on spin shots.
- Versatile enough to cover both attacking and controlled play for an advanced player.
Cons
- Medium high balance still asks for early preparation on defense compared with a fully round racket.
- Off centre contact costs pace and precision, and a mishit is felt honestly rather than cushioned.
- Not built for a player still developing consistent, repeatable technique.
Technologies & Materials
- 15K Carbon — the racket's face material, a woven carbon fiber aimed at a firm, consistent response and durability under repeated hard contact;
- Sanded surface finish — a rough textured face, aimed at adding spin and bite on the ball without a raised pattern.
What Makes the Siux Electra Stupa Pro ST4 2025 (Franco Stupaczuk) Special
What sets this racket apart is the hybrid shape itself, built between round and diamond rather than committing fully to either, paired with 15K Carbon faces on a medium high balance. That combination is aimed at giving a player real finishing power without the sharp trade off in defense that a full diamond, head heavy racket usually asks for. A sanded, rough surface finish across the face is aimed at adding spin without needing a raised texture pattern.
Gallery
How it Feels on the Court
Defense
The hybrid shape keeps the racket reasonably settled on a rushed defensive exchange. A well prepared lob still travels back with real depth.
Important
The medium high balance and firm 15K Carbon face still ask for early preparation compared with a fully round, lower balanced racket.
Net Play
The net is where the medium high balance pays off most clearly. A firm volley comes off the 15K Carbon face with real conviction, and the racket reacts quickly enough to handle a fast exchange without feeling delayed.
Bandeja & Víbora
Both shots pick up real carry from the hybrid shape and the 15K Carbon faces, and the sanded surface bites into a lifted, spinning bandeja specifically.
Note
The víbora comes through with genuine pace, matching the racket's overall attacking lean.
Smash
The smash is where this racket is most convincing, delivering a firm, explosive finish thanks to the medium high balance and 15K Carbon construction.
Maneuverability
The hybrid shape keeps the racket easier to redirect than a full diamond frame, though the medium high balance still asks for more commitment than a fully round, lower balanced racket.
Forgiveness
The sweet spot plays reasonably wide for a racket built this firmly around attack, but off centre contact still costs pace and precision quickly, and a mishit is felt honestly rather than absorbed.
Comfort
The medium hard touch reads as firm through contact, and a mishit sends noticeable feedback into the arm.
Advice
The hybrid shape keeps this more manageable than a full diamond, head heavy racket would.
Conclusion
Built on a hybrid shape between round and diamond, with 15K Carbon faces on a medium high balance, the Siux Electra Stupa Pro ST4 2025 is Franco Stupaczuk's attacking leaning signature racket within Siux's Electra range. The smash and net game show the clearest returns, backed by a sanded surface that adds real spin, while defense and off centre contact still ask more of the player than a fully round, lower balanced racket would. It suits advanced to professional players who want one racket for both attack and controlled play, while a player chasing maximum forgiveness or still building consistent technique is better served elsewhere in Siux's range.
Where to buy Siux Electra Stupa Pro ST4 2025
- Racket
- Siux
- 7 minutes
- John Macallan
