The School of Tennis Oddsodds.tennis
Default modelInterquartile mean (Vetted List)
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Sofia Costoulas v Mai Hontama

Kickoff: 2026-05-20 08:00 UTC

Closing line — the calculated probabilities and expected value from the last prices recorded before kickoff, under your selected model. The game has started, so these are not live figures. Assess the reliability of each model's probability predictions against all settled-game outcomes →

Head to Head

9 sportsbooks (6 in analysis )

Estimated chance of each outcome, according to the model: Interquartile mean (Vetted List)

Sofia Costoulas (Local)

Prediction 70.49%1.42fair odd
EV -1.31%
Edge -0.937%
Kelly -3.28%
Growth +0.000%

assuming max odds 1.40

Bookmakers’ predictions’ distribution
69.32%70.37%70.60%70.96%MIN.MEANMEDIANMAX.
Odds’ distribution
1.281.341.331.4078.13%74.81%75.19%71.43%MIN.MEANMEDIANMAX.

Mai Hontama (Visit)

Prediction 29.51%3.39fair odd
EV -2.92%
Edge -0.886%
Kelly -1.27%
Growth +0.000%

assuming max odds 3.29

Bookmakers’ predictions’ distribution
29.04%29.63%29.40%30.68%MIN.MEANMEDIANMAX.
Odds’ distribution
2.953.143.203.2933.90%31.81%31.25%30.40%MIN.MEANMEDIANMAX.

At the last prices before kickoff, Interquartile mean (Vetted List) estimated these probabilities for Head to Head: Sofia Costoulas (Local): 70.49%; Mai Hontama (Visit): 29.51%. For Sofia Costoulas (Local), that estimate was equivalent to fair decimal odds of 1.42. No eligible bookmaker offered closing odds above that level: the best were 1.40, with an expected value of -1.31%; they did not produce positive expected value.

Sportsbook Odds (9 sportsbooks)

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BookmakerLocal ▼VisitMarginUpdated
GTbets🎯1.40I 71.43%NM 69.57%EV -1.31%E -0.937%K -3.28%G +0.000%3.20I 31.25%NM 30.43%EV -5.57%E -1.74%K -2.53%G +0.000%2.7%2026-05-19 16:58
Pinnacle🎯1.36I 73.53%NM 70.75%EV -4.13%E -3.04%K -11.48%G +0.000%3.29I 30.40%NM 29.25%EV -2.92%E -0.886%K -1.27%G +0.000%3.9%2026-05-20 03:29
PlayUp🎯1.36I 73.53%NM 70.18%EV -4.13%E -3.04%K -11.48%G +0.000%3.20I 31.25%NM 29.82%EV -5.57%E -1.74%K -2.53%G +0.000%4.8%2026-05-20 06:09
Marathon Bet🎯1.35I 74.07%NM 69.32%EV -4.84%E -3.58%K -13.82%G +0.000%3.05I 32.79%NM 30.68%EV -10.00%E -3.28%K -4.88%G +0.000%6.9%2026-05-20 03:19
Betway🎯1.33I 75.19%NM 70.96%EV -6.25%E -4.70%K -18.93%G +0.000%3.25I 30.77%NM 29.04%EV -4.10%E -1.26%K -1.82%G +0.000%6.0%2026-05-19 09:50
BoyleSports🎯1.33I 75.19%NM 69.98%EV -6.25%E -4.70%K -18.93%G +0.000%3.10I 32.26%NM 30.02%EV -8.52%E -2.75%K -4.06%G +0.000%7.4%2026-05-19 17:00
theScore Bet🎯1.32I 75.76%NM 70.80%EV -6.95%E -5.27%K -21.72%G +0.000%3.20I 31.25%NM 29.20%EV -5.57%E -1.74%K -2.53%G +0.000%7.0%2026-05-19 16:50
Unibet (FR)🎯1.30I 76.92%NM 69.41%EV -8.36%E -6.43%K -27.87%G +0.000%2.95I 33.90%NM 30.59%EV -12.95%E -4.39%K -6.64%G +0.000%10.8%2026-05-20 07:49
NetBet (FR)🎯1.28I 78.13%NM 70.44%EV -9.77%E -7.63%K -34.90%G +0.000%3.05I 32.79%NM 29.56%EV -10.00%E -3.28%K -4.88%G +0.000%10.9%2026-05-19 17:50
Margin = Margin (Overround) · I = Implied Probability · NM = No-Margin Probability · EV = Expected Value · E = Edge · K = Kelly Criterion · G = Bankroll Growth

Updated is when each book last changed its price, so an older time means the odds simply haven't moved, not that the price is stale. Books not seen in the last ~15 minutes are normally dropped; only if a whole market's feed goes quiet are the latest recorded prices shown instead.

Exchanges (1)

BookmakerLocalVisitMargin ▲Updated
Novig◎1.37I 72.99%NM 71.04%3.36I 29.76%NM 28.96%2.8%2026-05-20 06:49