Seeding normally follows world rankings directly. A grass championship spent years applying its own calculation instead, and the reasoning was about what rankings measure.
What seeding is designed to prevent
A draw made at random can pair the two strongest players in the first round, which removes a likely final before the tournament begins. Seeding separates them.
Seeds are distributed through the bracket so that the highest-ranked cannot meet until late rounds. The structure protects the tournament's competitive shape.
Because the protection depends on ranking the field correctly, the accuracy of the seeding order matters directly. A misplaced seed distorts the entire draw.
Why rankings understate grass ability
World rankings aggregate results across hard, clay and grass courts over a rolling year. Grass accounts for only a short portion of the season.
A player who excels on grass but struggles on clay will therefore rank below their grass-court standard. The aggregate hides surface specialisation.
Because the grass season is brief, there are few opportunities to correct that within the ranking system. The distortion is structural.
How the adjusted formula worked
The tournament took ranking points as a base and added weighted credit for results on grass over recent seasons. Performance in the immediately preceding year counted most.
The calculation was published in advance, so players knew exactly how their seeding would be determined. Transparency was essential to acceptance.
The adjustment typically moved a small number of players by a few places rather than reordering the field. Its effect was targeted rather than sweeping.
Why the practice was eventually dropped
As playing styles converged across surfaces, the gap between grass specialists and all-court players narrowed. The formula corrected a distortion that was shrinking.
Consistency with other major tournaments also carried weight, since players benefit from predictable rules across events. Divergence required continual justification.
Abandoning it aligned seeding with the rankings used everywhere else. The change reflected the sport rather than a judgement that the formula had been wrong.
What the episode illustrates about seeding
Seeding is a model of expected strength, and every model embeds assumptions about what predicts results. Rankings assume surface-neutral ability.
Alternative models are defensible where that assumption fails, which is why the grass formula survived for so long. It was a correction, not a preference.
The wider lesson is that a draw is never neutral. Whichever ordering is chosen shapes which matches the tournament is likely to produce.
