Siux Electra Pro ST4 2025 Reviews

Unperforated center on the 15K carbon face gives the update a wider sweet spot and a crisp, dry feel on clean contact. At 361g with a 26.5cm balance, it's noticeably easier to defend with than the old ST3 and gives you more bounce on lobs and three-point smashes. The heavy sandy grit also bites great when you're slicing volleys at medium pace. That extra rebound comes with a catch, though, when the rally speeds up. If you don't get set early and pull the tip down on fast víboras or aggressive volleys, the ball can easily float into the back glass.

Got no center holes on the ST4 for a bigger, firmer sweet spot, and the smoother butt cap won't dig into your palm on low-grip blocks. It's a super complete all-rounder, though the core absorbs some pace on flat smashes.

A former tennis player recently switched to the Electra ST4 Pro and is very happy: big sweet spot, easy to handle, with a rough sandpaper-like surface.

Bought the ST4 Pro: manoeuvrable with a good sweet spot, medium-soft, and they're delighted and very comfortable with it.

Owns a 365 g ST4 (a 355 g unit felt less consistent): more output than their Air Viper, slightly softer and a lot more forgiving, with good manoeuvrability.

Great control and a large sweet spot, though not much power.

Testing the Siux ST4 Pro against the Babolat Counter Viper 2025, they find the ST4 more helpful: plenty of power, an easier x3, a huge sweet spot, comfortable all match and better lobs.

Switched from the Vertex 04 to the ST4: it helps with mishits, but they feel it doesn't have enough bite.

Their favourite of everything tried so far: friendly, big sweet spot, good manoeuvrability, and the trampoline effect helps a lot in defence.

15K carbon face gives you great control on defensive lobs and surprising pop on smashes after two weeks on court. It's super versatile, even if the ball sometimes feels like it sinks a bit too deep into the rubber.