MODEL PREDICTION · 2026-09-29
● HARD

A. Kalinina vs J. Tjen — prediction

Beijing
✗ Missed
KALININAWIN PROBABILITYTJEN
52%
model prob.
@1.91
odds · 52% impl.
⏱Rest 2d vs 13d◐Hard 37%🎾Serve 56%📈Form 5/10
CONDITIONS OF THE MATCH◆ in the model◇ context
Surface◆
Hard

Consistent bounce, medium-fast: neutral conditions, no style favored.

Temperature◇
26°C

Warm: the ball flies a little more and fitness counts.

Humidity◇
56%

Humid air: the ball loses some speed.

Wind◇
5 km/h

Light wind: no noticeable effect.

Surface feeds the model (surface specialization is one of its factors). Weather and altitude are context we publish for you — they do NOT move the probability.

OUR MODEL'S REASONING

›Ranking: #50 vs #49

›Recent form: 5/10 in recent matches

›Match-sharp: 3 matches in the last 2 weeks

Calibrated model probability (~64% out-of-sample accuracy, validated specifically on WTA). Not a guarantee: the model ≈ the market on average, so the odds already capture almost all the edge. 18+ · gamble responsibly.
@1.91
fair odds
−0.2%
expected value
BREAKDOWN · MODEL ANALYSIS

The model makes A. Kalinina the favorite with a 52% win probability, against J. Tjen's 48% — a tight match, without a wide margin. Converted to odds, that probability is worth about @1.91; the offered odds are around @1.91 (a 52% implied), virtually the same as what the market prices in.

Several factors explain the number: #50 vs #49; 5/10 in recent matches; 3 matches in the last 2 weeks.

Read it with perspective. Our probability is calibrated — when the model says 52%, that outcome happens roughly that percentage of the time, with ~64% out-of-sample accuracy — but being the favorite is not being the winner: roughly 48 out of every 100 times Tjen wins. The model also tends to agree with the market, so the odds already capture almost all the edge: don't take it as a sure value. This is informational analysis, not a betting recommendation. 18+ · play responsibly.

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