Tennis: singles, ATP/WTA tours
The Elo ranking
A rating computed on the matches actually played, not on what a record accumulates. Every value traces back to the matches that produced it.
Confront two players
Pick two players: the model gives each one's chance of winning, read from their current ratings and from nothing else.
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Offered here on the 10 leading players. Any other pair in the ranking is answered by the API. See the API
What are these percentages worth, once checked against the results?
How it is measuredCompare careers
8 of 8 drawn ·
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290 ranked · at least 20 matches · active within 24 months · Elo v1
Verifiable
Jannik Sinner's rating comes from 410 matches, each with the change it produced.
See the detail →This ranking does not replace the circuit's official one, which totals what a career accumulates over a rolling window. Sources and coverage