Anti-spin: neither generating nor returning spin
The three previous sections covered pimpled rubbers — short, long and medium — and their relationship with incoming spin. Anti-spin is not a pimpled rubber. It is, technically, an inverted rubber: its topsheet has the pimples facing inwards, like any inverted rubber. Yet it shares something essential with pimpled rubbers: its function is to neutralise spin, not to generate it. That is why it is grouped into this chapter.
What distinguishes anti-spin from any other inverted rubber is the surface. The topsheet of a conventional rubber presents a certain roughness — mechanical or chemical — that grips the ball and transmits rotation to it, as explained in 5.1. The anti-spin topsheet deliberately lacks that adhesion. Its surface is slippery, almost waxy to the touch: the ball slides over it without the rubber imparting significant rotation. A serve played with anti-spin comes off practically without spin, whatever the movement of the arm. And a topspin arriving loaded with rotation finds no grip: the surface cannot hold the ball to turn that spin into a stroke of its own.
The mechanism differs from that of long pimples. Long pimples reverse spin because their flexible cylinders bend and return the rotational energy with the opposite sign, as described in 6.3. Anti-spin bends nothing: its surface barely grips the ball, so it neither imparts rotation of its own nor fully stops the rotation the ball brings. Part of that spin can survive the contact, and the ball then comes back as if it had met a heavily damped long pimple. But the whole assembly absorbs so much energy that what the opponent receives is above all a flat, slow ball with far less rotation than they expected, and that lack of spin forces an adjustment as awkward as the reversal of long pimples, though for different reasons.
The sponge accompanying the anti-spin topsheet is usually soft and slow. The assembly is designed to absorb energy, not to return it. The ball comes off with little speed of its own and on a low, predictable trajectory. The player with anti-spin is after neither power nor rotation: they are after returning the ball awkwardly, neutralising the opponent's initiative. It is a game of patience and placement, not of force.
The user profile is very specific. Anti-spin appears almost always on the backhand of players combining an attacking inverted rubber on the forehand with this neutralising surface on the other side. The blocker's bat described in 12.6 is its natural habitat: a firm blade that transmits little, an attacking rubber on one side to attack when the opportunity arises, and anti-spin on the other to absorb and disable the opponent's game. Some defenders use it as an alternative to long pimples when they prefer a dead ball to a ball with reversed spin: it is a question of what kind of discomfort one wants to inflict.
Its presence on the competitive circuit is marginal. The vast majority of players — defensive ones included — prefer long pimples, which besides neutralising spin offer reversal as an additional weapon. Anti-spin has remained a niche tool for a style of play that puts cancellation ahead of any other dimension. The market reflects that reality: the available models are few and are renewed infrequently. Butterfly's Super Anti and the options from Der Materialspezialist are the best-known references.
What anti-spin demonstrates, in the end, is that an inverted rubber need not generate spin. The same inverted topsheet structure presented in 5.1 as the surface of maximum friction can, with another chemical formulation, become the surface of minimum friction. Section 6.6 places anti-spin alongside the other special types on a map of player profiles, and the table in 6.7 shows its behaviour against each incoming stroke.