Short answer: Andrey Rublev plays the Head Gravity Pro. His primary string is Luxilon Adrenaline, a co-polyester, strung at 26 kg in the mains and 25 kg in the crosses, roughly 57 and 55 lbs.
The frame
The Gravity Pro is the heaviest, most control-oriented frame in Head's Gravity line, built around a 100 sq in head with an 18x20 pattern. That combination is unusual: a large head size normally comes with an open pattern for spin and power, but the dense 18x20 pulls the power back down and turns it into a control frame with a big sweet spot.
It suits Rublev because he hits with enormous pace and needs the frame to contain it rather than add to it. The Gravity Pro is one of the more demanding retail frames on the market, closer to tour spec out of the box than most.
Published specs
- Head size: 100 sq in
- String pattern: 18x20
- Character: heavy, low-powered, control-first
String and tension
Luxilon Adrenaline at 26 kg mains and 25 kg crosses. The small drop in the crosses is a common tour trick: it lets the mains slide and snap back more freely, which adds spin without giving up the control the tension is there to provide.
Community reports have him trialling other polys depending on conditions and ball type, including Luxilon 4G and Head Lynx Tour. Players at this level swap strings more often than the marketing suggests, so treat Adrenaline as his baseline rather than a permanent fixture.
We should be straight about availability: we do not carry Luxilon Adrenaline. The setup link on this page loads Head Lynx Tour instead, one of the strings he has actually used, and a reasonable stand-in with a similar firm, control-oriented character. It is not the same string, and we would rather tell you than let you assume.
What you can actually buy
The Gravity Pro is a retail frame and it is the one he plays. No pro stock mystery here, though as with every tour player the specific frames in his bag will be weight-matched and customized.
Be honest with yourself about this racquet. An 18x20 pattern at Gravity Pro weight gives you almost nothing for free. If you are not generating your own pace, the Gravity MP or Tour is the better entry point into the same feel.
Should you play this setup?
The tension is close to sane for a strong player, though 57 in a full poly bed is still firm for most club players. Drop to the low 50s.
The frame is for advanced players with fast, full swings. If that is you, few racquets give you more control at a 100 sq in head size.
Sources
Frame and string details reported by Tennisnerd and corroborated in gear community discussion. Tour setups change with conditions and through a season, so treat this as current rather than fixed.