Challenger · ELO ESTIMATE · 2026-09-20
● HARD

D. Ostapenkov vs Q. Vandecasteele — prediction

San Diego 2 (Usa) - Qualification
✓ Correct
OSTAPENKOVWIN PROBABILITYVANDECASTEELE
52%
Elo prob.
@2.07
odds · 48% impl.
🎾Serve 66%📈Form 5/10
CONDITIONS OF THE MATCH◆ in the model◇ context
Surface◆
Hard

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

Temperature◇
23°C

Mild: neutral conditions.

Humidity◇
70%

Humid air: the ball loses some speed.

Wind◇
12 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.

WHAT THE ESTIMATE IS BASED ON

›Tour Elo: 1664 vs 1650 — favorite by rating

›Challenger tier · 145 matches in the favorite's track record

›Elo estimate (not the ATP factor model): these are softer, less-analyzed markets

WATCH FOR

!Soft market: the value edge in Challenger/ITF is NOT proven live — treat it as an estimate, not an opportunity.

Tour Elo estimate (Challenger/ITF markets, not covered by the factor model). The value edge here is unproven live — it's a reference, not a recommendation. 18+ · gamble responsibly.
@1.92
fair odds
+7.7%
expected value
BREAKDOWN · ELO ESTIMATE

The model makes D. Ostapenkov the favorite with a 52% win probability, against Q. Vandecasteele's 48% — a tight match, without a wide margin. Converted to odds, that probability is worth about @1.92; the offered odds are around @2.07 (a 48% implied), slightly above the market, so the model is a touch more optimistic.

Several factors explain the number: 1664 vs 1650 — favorite by rating; challenger tier · 145 matches in the favorite's track record; these are softer, less-analyzed markets.

Read it with caution. This number does NOT come from the ATP factor model, but from the tour's real Elo: it ranks who is the favorite well, but it is a coarser estimate. Being the favorite is not being the winner: roughly 48 out of every 100 times Vandecasteele wins. And above all, in Challenger/ITF the value edge is not proven live, so treat it as a reference, not an opportunity. Watch out for: Soft market: the value edge in Challenger/ITF is NOT proven live — treat it as an estimate, not an opportunity.. This is informational analysis, not a betting recommendation. 18+ · play responsibly.

Analyze today's matches →