Called the '39-point system' (the most games that could be played in a 3-set match), this ranking algorithm awards winners, but gives losers an incentive to win as many games as possible.
- You may challenge anyone in the ladder.
You MUST play a best 2 of 3 match.
If you defeat a higher-ranked player, your point value is replaced with the opponent's point value plus 39 points minus the number of games won by the loser.
If you defeat a lower-ranked player, your points are increased by 39 points minus the number of games won by the loser.
The losing player's points are increased by the number of games they won.
- Challenges expire after 10 days. This auto-declines the challenge, and decreases the challenged player's points by 20.
- No ranking change occurs if a challenge withdrawn by the challenger.
Joe beat Ann 6-2, 4-6, 6-4
Ann had 24 points, Joe had 14 points
Joe now has 14 + (39 - 12) = 41 points
Joe now has 24 + 12 = 36 points