How the Rating System Works
Understand how player ratings are calculated, including rating bands, upset bonuses, and point exchanges
ServeLeague uses a points-based rating system inspired by Elo, designed specifically for racket sports. After each match, both players gain or lose rating points based on the rating gap between them and how close the match was. The system rewards upsets, encourages competitive play, and provides accurate skill tracking over time.
Standard Rating System
Our rating system uses a points-based approach where players gain points for wins and lose points for losses. The amount of points exchanged depends on two key factors: the rating difference between players and how close the match was.
Rating Bands
| Rating Difference | Higher-Rated Wins | Lower-Rated Wins (Upset) |
|---|---|---|
| 0 – 25 | 8 | 8 |
| 26 – 50 | 7 | 10 |
| 51 – 100 | 5 | 12 |
| 101 – 150 | 3 | 15 |
| 151 – 200 | 2 | 20 |
| 201 – 250 | 1 | 26 |
| 251 – 500 | 0.5 | 32 |
| 501+ | 0 | 64 |
The bigger the rating gap, the fewer points a favourite gains for winning, but the more points an underdog gains for an upset victory.
Match Format Discounts
| Format | Win Multiplier | Lose Multiplier | Notes |
|---|---|---|---|
| Best of 5: 3-0 | 100% | 100% | Full points |
| Best of 5: 3-1 | 90% | 90% | 90% of base points |
| Best of 5: 3-2 | 75% | 75% | 75% of base points |
| Best of 7: 4-0 | 100% | 100% | Full points |
| Best of 7: 4-1 | 90% | 90% | 90% of base points |
| Best of 7: 4-2 | 75% | 75% | 75% of base points |
| Best of 7: 4-3 | 50% | 50% | 50% of base points |
Different match formats apply different multipliers to encourage competitive play.
Special Rules
Play Compensation
Both players receive +2 points per match against opponents within ±500 rating points. This compensates for "rating drain" when improving players leave the system.
Upset Bonus
Lower-rated players who win receive more points than higher-rated winners (see Rating Bands table). This creates natural rating mobility.
Merit Points
Separate from ratings, merit points track annual success. Winners earn (Opponent Rating ÷ 10) × Discount Factor. Losers can earn consolation points for close matches.
Example Calculation
Player A (Winner)
Alice
Rating: 1050
Player B (Loser)
Bob
Rating: 1000
Step-by-Step:
- Rating difference: 1050 - 1000 = 50 points (Band: 26-50)
- Base points for this band: 7 points (higher wins) / 10 points (lower wins)
- Alice won, so she gains base points: 7
- Match result was 3-1, so discount factor = 0.9
- Points exchanged: 7 × 0.9 = 6.3 points
- Play compensation: Both players within ±500, so +2 each
- Final change: Alice +8.3, Bob -4.3
Winner
1058
(+8)
Loser
996
(-4)
Expected Win Percentages
The rating difference gives an indication of expected winning percentage:
| Your Rating Advantage | Your Win % |
|---|---|
| 0 to 25 | 50% |
| 25 to 50 | 59% |
| 50 to 100 | 71% |
| 100 to 150 | 83% |
| 150 to 200 | 91% |
| 200 to 250 | 96% |
| 250 to 500 | 98% |
| Over 500 | ~100% |
Merit Consolation Points
Losing players earn consolation merit points for close matches. The closer the loss, the more merit you receive:
| Loss Result | Merit Earned (% of winner |
|---|---|
| 0-3 loss | 0% |
| 1-3 loss | 10% |
| 2-3 loss | 25% |