Spin numbers flatter the player who is losing the point

The highest revolutions per minute in a rally usually come from the person in trouble, which makes the stat a poor measure of dominance.

Somebody hits a forehand at four thousand revolutions per minute and the graphic goes up, and the implication is that this was a weapon. Quite often it was a rescue.

Think about where extreme spin comes from mechanically. You get it by swinging steeply upward, brushing the back of the ball, accepting less forward velocity in exchange for a curved trajectory with a huge margin over the net and a violent drop. That is exactly what you want when you are outside the doubles alley, off balance, needing height and time and depth. Which is to say: when you are losing the point.

The player controlling that same rally is standing inside the baseline, taking the ball early, hitting flatter and harder and with far less spin, because they do not need the margin. Their number looks worse. They are winning.

So a spin average across a match is close to meaningless without knowing the court position it was generated from, and most of the numbers pushed at viewers come with no such context. It is the same error as judging a footballer by distance covered. The chasing team runs further.

What is genuinely useful is the pairing: revolutions per minute alongside contact position and net clearance. High spin from inside the baseline with low clearance is a serious attacking shot, the ball dipping onto the line at speed. High spin from four metres behind with two metres of clearance is a defensive lob with ambitions. Identical on the spin readout, opposite in meaning.

I would go further and say the sport's obsession with peak spin has affected coaching for the worse. Juniors are taught to generate the number, because the number is measurable and impresses at academies, and they arrive on tour with enormous topspin, terrible balance moving forward and no idea how to flatten out a ball when a short one arrives. You can watch them push a sitter back into play with heavy spin, from a position where the point should have ended, purely out of habit.

Spin is a tool for buying margin. Margin is worth having when you need it and worth spending when you do not, and a player who cannot tell the difference will produce beautiful data while losing in straight sets.