How to use this calculator
- Enter both players' ratings from the same system.
- Choose the actual win or loss.
- Enter total games won and lost.
- Review the composite score, expected chance, game share, and performance rating together.
#2804 · Sports & Gaming Tool
Tennis Rating Performance Score Calculator
Evaluate a tennis match against the strength of the opponent and the share of games you won. This tool blends an Elo-style expected win probability with the actual result and game percentage to create a 0–100 match performance score. It is useful for reviewing one match consistently, but it is not an official UTR, NTRP, WTN, or federation rating update.
Calculator
Enter your session dataFormula
Expected win probability = 1 ÷ (1 + 10^((opponent − player) ÷ 400)). Score = 100 × [45% result + 35% game share + 20% expectation adjustment].
What the result means
A score near 50 represents a broadly expected performance for the matchup. Winning as an underdog lifts the score, while losing heavily as a favorite reduces it. Use the components to understand why.
Rating systems use different scales and proprietary update rules. Enter two ratings from the same system and treat this as an independent review tool.
Example calculation
A 1600-rated player losing 10–13 to a 1650-rated opponent has a 42.9% expected win chance and wins 43.5% of games. The resulting performance score is 26.6/100 and the estimated single-match performance rating is 1604.
Tips for better results
- Do not mix UTR, NTRP, WTN, and Elo-like numbers.
- Include all completed games, including deciding sets.
- Review serve and return patterns before judging the score alone.
- Track several matches; one result is noisy.
- Use retirements and unusual formats cautiously.
Frequently asked questions
Can I enter UTR numbers in this calculator?
The formula assumes an Elo-like 500–3000 scale, so raw UTR values are not appropriate without a valid conversion.
What happens if the opponent has a much higher rating?
Your expected win probability falls, so a competitive scoreline or win receives more credit.
Does winning always produce a high performance score?
A win contributes strongly, but game share and whether you were favored also affect the total.
Is the performance rating an official new rating?
No. It is a single-match estimate derived from game share and should not replace an official update.
How should I enter a match tiebreak?
Use completed regulation games; do not count individual tiebreak points as games.
Related calculators
Variables and assumptions
| Variable | Meaning |
|---|---|
| Expected win chance | Elo-style pre-match probability from the rating gap. |
| Game share | Games won divided by total completed games. |
| Result component | 45 points for a win and zero for a loss. |
| Performance rating | Single-match rating implied by game share, with safe limits. |