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Ladder Rules, Ranking System

SETTING UP MATCHES

    Members may issue challenges to any other members in their league. When members login, phone numbers of other players will be visible. Likewise, email addresses are available only when logged-in. Click the "p" (for profile) button beside the player's name to see email address.

    Players must make every effort to make and accept proper challenges both upward and downward.

    If a challenge cannot be agreed upon with a particular player, try someone else.


LEAGUE PLAY

    The time and day for a match must be mutually agreeable.

    Both players should bring a can of balls to the match and the winner keeps the unopened can.

    The 20-point system and the 15-point system require 2 out 3 set scoring to properly determine rankings. The 9-point system requires that a single 8 game proset be played. The Pyramid system only requires that one player wins and one player loses, scoring is incidental. The Quality system only requires that one player wins and one player loses, but margin of victory is very important in determining rank - method of scoring should be consistent throughout the league matches to achieve consistent results.

    When scoring is required to be conventional 2 out of 3 sets, a 7-point tie breaker (first to 7 by a margin of 2) should be used at 6 games all in each set. The League Administrator may decide to use "no-ad" scoring. The League Administrator may also decide that a third set be replaced by a 7-point tie-breaker. Scoring for the final set in this instance will be recorded as a regular set. In other words, a game per tie-break point. If the tiebreaker requires playing more than 12 points to achieve a win, the final set should nonetheless be recorded as 7-6. The League Administrator will notify all members as to the scoring method at the beginning of the season.

    If a match is interrupted for any reason, it may be continued to completion at another time by agreement of both players. Or the player leading the match at the point of interruption can be considered the winner. A match is only valid if at least one set has been completed. Both players must agree to the settlement. If no settlement can be made, the match must be completed or replayed at a later date - otherwise do not enter a score. Games must be added to the score to make a complete match - Do not enter incomplete match scores!

    There are no ties in tennis. If a tied score is entered into the TennisEngine, the player entered on the top line is declared the winner.

    When a match is won as a result of one player retiring for any reason, sufficient games must be added to the incomplete sets to complete the match. For example, if Jim was leading Bob 6-2, 4-0, and Jim retired, the score would be recorded: Bob def. Jim 2-6, 6-4, 6-0. Loss of condition means loss of match.

    Unless otherwise stated, all competition will comply with USTA playing rules.


AFTER THE MATCH

    The winner should enter the match results on the TennisEngine web site from his/her personal member page. The match results and subsequent new rankings will be posted immediately.

    Otherwise the score must be emailed, faxed or phoned-in to the League Administrator. A drop-off point may be coordinated by the League Administrator for score sheet collection and posting by the Administrator.

    The League Administrator will make every effort to post results from score sheets on a timely basis.

Ranking System: The Quality System is great for closed leagues where a match schedule is organized by the League Administrator. It is also very accurate for challenge ladders but does require that at least 3 matches be played to establish an accurate ranking for an individual. This is a great system for USTA Team Tennis or high school conference tennis to assess talent. This is the most accurate system for ranking players against the field, across an entire season - based on margin of victory, opponent strength as well as win/loss records. Sort of a "Sagarin Predictor" system for tennis players, if you will. Any method and combination of scoring can be used (2 out of 3 set, pro-set, single set)


Quality-based Ranking System

Please be advised that this system depends on a reasonable amount of match data. A player or doubles team needs to have at least 3 matches logged before an accurate ranking can be calculated.

The Tennis Engine computes player rankings based upon a proprietary algorithm that evaluates every match played for the life of the league or conference. The system is designed to rank each player based upon a combination of performance (derived from match results) and activity (how many matches played and against whom).

When a new match is entered, the Tennis Engine adjusts your ranking based on the following factors:

    Current match win or loss

    Current match performance (% of games won)

    The strength of each of your past opponents

    Your overall match winning percentage

    Your overall game winning percentage

Furthermore, the ranking of every player who has played you or your opponent will be affected by the outcome of your match.

Winning or losing a close match with a highly rated player could boost your ranking, whereas a close match with a lower rated player could reduce your ranking. Decisive wins over lower rated players could be less rewarding than close wins over higher rated players. Confused? Simply put... winning matters the most, but after that it's all about whom you play and how close you play them.

Strength Rating

The rankings are based on each player's current Index value (i.e. the third ranked player has the third highest Index). Each player's Index is a combination of his Strength Rating and the number of wins. Each player's Strength Rating is viewable in his player profile.

Your Strength Rating (SR) is the measure of your ability to:

    win matches against the field of participants

    win a high percentage of games in all matches

    perform well against higher rated players

Your Strength Rating will improve with more matches won and a better percentage of games won. The strength (SR) of the opponents you play is also factored into the calculation (Each player's SR is located inside his profile along with other information).

Your SR will fluctuate as other participants compete. It might rise as players whom you have defeated accumulate wins over other players. Inversely, your SR might dip if players who have beaten you suffer losses.

The online league is updated every time a match is entered. Any method and combination of scoring can be used.