How do tennis world rankings work?

Both the ATP and WTA rankings are rolling 52-week systems: your ranking reflects points earned over the previous twelve months, not a career total and not a calendar year.

How points are earned. Tournaments are graded by importance, and points are awarded by how far you progress:

Grand Slams award the most — 2,000 points to the winner.

ATP Masters 1000 / WTA 1000 events award 1,000.

Then descending tiers — 500-level, 250-level, and the developmental Challenger and ITF circuits below them.

The defining feature: points expire. Points earned at a tournament drop off exactly 52 weeks later, and are replaced by whatever you score at that tournament this year. This is why commentators talk about defending points — a player who won a title last year must reach the same stage again simply to stand still, and will fall sharply if they do not.

It also means rankings respond to a rolling window of current form rather than reputation, and why a long injury absence causes a collapse in ranking regardless of ability.

Only a limited number of results count. The ATP counts a player's best 19 tournaments, with the Slams and mandatory Masters events among them; the WTA uses a comparable structure. Playing more events beyond that does not add points unless the results beat what you already hold.

Why the ranking matters practically: it determines direct entry into tournaments, and it determines seeding, which shapes the draw — a high seed avoids other high seeds until late rounds.

The Race is a separate, calendar-year table used to determine qualification for the season-ending finals.

Wimbledon has historically used its own seeding formula for the men's draw, weighting grass-court results.