The rating scale
Ratings run from 1.5 to 7.0 and align with NTRP levels. Bands are spaced 0.5 apart (1.5, 2.0, 2.5 ... 6.5, 7.0). A profile with a factual USTA designation begins from that band. A profile without one starts provisionally at 3.5 until reviewed match evidence establishes a better read. The level-up meter shows the current TiQ signal against the next half-point marker; it does not replace an official USTA rating.
Two independent tracks
Every player carries two parallel sets of dynamic ratings: a TIQ track that updates from all matches regardless of source, and a USTA track that updates only from eligible USTA results, including reviewed local uploads and factual USTA-match evidence. TIQ ratings reflect full competitive activity across all leagues; USTA ratings mirror what a USTA-only result set would produce. Both tracks maintain separate singles, doubles, and overall ratings -- six dynamic values per player in total.
Expected performance
Before each scored match the system estimates each side’s expected share of games from their current ratings:
expected game share = 1 / (1 + 10 ^ ((opponent rating - your rating) / 1.6))
The rating change starts with actual game share minus expected game share. A result close to expectation makes only a small move. A lower-rated player who keeps a strong opponent close can therefore gain rating despite losing; a favorite who wins less decisively than expected can give some rating back. The Win% column remains a pre-match win estimate, separate from this score-aware performance calculation.
K-factors
The K-factor controls how much a single match can shift a rating. TenAceIQ uses three separate K values: 0.12 for singles, 0.107 for doubles, and 0.052 for the overall rating. For a usable score, the movement is roughly K x (actual game share - expected game share). When a score is unavailable, the system uses a conservative expected win/loss fallback.
New players are in a provisional phase where the K-factor is temporarily multiplied to help them converge to their true level faster:
- Matches 1-9: 2x K (fast calibration)
- Matches 10-19: 1.5x K
- Matches 20-29: 1.2x K
- Match 30+: 1x K (stable)
The confidence level shown on a player profile -- Low, Medium, or High -- reflects these phases directly. A Low confidence rating is still moving quickly toward equilibrium.
How the score changes the signal
A 7-6, 7-6 result between similarly rated players is nearly what the ratings predict, so it moves them only slightly. A 6-0, 6-0 result or a close loss by a substantially lower- rated player is more informative because the game share differs more from expectation.
Recent results carry somewhat more weight, and an upset win receives a modest additional boost. These adjustments refine the performance signal; they do not use an external source’s proprietary rating.
Doubles context
Doubles begins with the combined strength of both players on each side. TiQ then reads the result against that team expectation and maintains a separate doubles signal. When a stronger player has a materially lower-rated partner and loses a close scored match to a comparable pair, TiQ protects that player from a speculative negative adjustment.
Recency weighting
When ratings are recalculated, matches are weighted by how recently they were played. A match played today carries full weight (1.12x); a match played two or more years ago carries reduced weight (0.88x), with a linear scale in between. A player’s recent form therefore has more influence on their current rating than results from seasons ago.
Inactivity and confidence
Time away does not regress a player toward a default rating. TenAceIQ changes rating strength only when an eligible match result is processed. Match volume and the age of a player’s last result provide context for how much evidence sits behind that rating.
Score parsing and edge cases
Scores are normalized before processing. Tiebreak notation like 7-6(3) has the point score stripped, leaving 7-6. Match tiebreaks stored without brackets (e.g. 10-8) are excluded from the set-level calculation to avoid inflating game counts. A 7-5 set is treated as a regular set, not a tiebreak. Retirements and walkovers use the conservative win/loss fallback because they do not provide a complete game-share signal.