The School of Tennis Oddsodds.tennis
Default modelInterquartile mean (Vetted List)
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August Holmgren v Facundo Diaz Acosta

Kickoff: 2026-05-21 09:00 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

11 sportsbooks (6 in analysis )

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

August Holmgren (Local)

Prediction 28.69%3.49fair odd
EV -0.736%
Edge -0.213%
Kelly -0.299%
Growth +0.000%

assuming max odds 3.46

Bookmakers’ predictions’ distribution
27.77%28.60%28.65%29.07%MIN.MEANMEDIANMAX.
Odds’ distribution
3.183.253.223.4631.45%30.73%31.06%28.90%MIN.MEANMEDIANMAX.

Facundo Diaz Acosta (Visit)

Prediction 71.31%1.40fair odd
EV -5.16%
Edge -3.88%
Kelly -15.63%
Growth +0.000%

assuming max odds 1.33

Bookmakers’ predictions’ distribution
70.93%71.40%71.35%72.23%MIN.MEANMEDIANMAX.
Odds’ distribution
1.271.311.311.3378.74%76.34%76.34%75.19%MIN.MEANMEDIANMAX.

At the last prices before kickoff, Interquartile mean (Vetted List) estimated these probabilities for Head to Head: August Holmgren (Local): 28.69%; Facundo Diaz Acosta (Visit): 71.31%. For August Holmgren (Local), that estimate was equivalent to fair decimal odds of 3.49. No eligible bookmaker offered closing odds above that level: the best were 3.46, with an expected value of -0.736%; they did not produce positive expected value.

Sportsbook Odds (11 sportsbooks)

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BookmakerLocal ▼VisitMarginUpdated
Pinnacle🎯3.46I 28.90%NM 27.77%EV -0.736%E -0.213%K -0.299%G +0.000%1.33I 75.19%NM 72.23%EV -5.16%E -3.88%K -15.63%G +0.000%4.1%2026-05-21 08:50
PlayUp🎯3.30I 30.30%NM 28.73%EV -5.33%E -1.61%K -2.32%G +0.000%1.33I 75.19%NM 71.27%EV -5.16%E -3.88%K -15.63%G +0.000%5.5%2026-05-21 08:40
theScore Bet🎯3.30I 30.30%NM 28.42%EV -5.33%E -1.61%K -2.32%G +0.000%1.31I 76.34%NM 71.58%EV -6.58%E -5.02%K -21.23%G +0.000%6.6%2026-05-21 08:50
GTbets🎯3.28I 30.49%NM 28.70%EV -5.90%E -1.80%K -2.59%G +0.000%1.32I 75.76%NM 71.30%EV -5.87%E -4.45%K -18.34%G +0.000%6.2%2026-05-21 08:50
Betway🎯3.25I 30.77%NM 29.04%EV -6.76%E -2.08%K -3.00%G +0.000%1.33I 75.19%NM 70.96%EV -5.16%E -3.88%K -15.63%G +0.000%6.0%2026-05-21 04:50
Marathon Bet🎯3.22I 31.06%NM 29.07%EV -7.62%E -2.37%K -3.43%G +0.000%1.32I 75.76%NM 70.93%EV -5.87%E -4.45%K -18.34%G +0.000%6.8%2026-05-21 07:00
NordicBet🎯3.20I 31.25%NM 28.89%EV -8.19%E -2.56%K -3.72%G +0.000%1.30I 76.92%NM 71.11%EV -7.30%E -5.61%K -24.32%G +0.000%8.2%2026-05-21 08:50
Unibet (FR)🎯3.20I 31.25%NM 28.89%EV -8.19%E -2.56%K -3.72%G +0.000%1.30I 76.92%NM 71.11%EV -7.30%E -5.61%K -24.32%G +0.000%8.2%2026-05-21 08:50
Betsson🎯3.20I 31.25%NM 28.89%EV -8.19%E -2.56%K -3.72%G +0.000%1.30I 76.92%NM 71.11%EV -7.30%E -5.61%K -24.32%G +0.000%8.2%2026-05-21 08:50
NetBet (FR)🎯3.20I 31.25%NM 28.41%EV -8.19%E -2.56%K -3.72%G +0.000%1.27I 78.74%NM 71.59%EV -9.44%E -7.43%K -34.94%G +0.000%10.0%2026-05-21 07:30
MyBookie.ag🎯3.18I 31.45%NM 29.02%EV -8.77%E -2.76%K -4.02%G +0.000%1.30I 76.92%NM 70.98%EV -7.30%E -5.61%K -24.32%G +0.000%8.4%2026-05-21 08:50
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 (2)

BookmakerLocalVisitMargin ▲Updated
Smarkets◎3.75I 26.67%NM 26.18%1.33I 75.19%NM 73.82%1.9%2026-05-21 08:40
Novig◎3.50I 28.57%NM 27.69%1.34I 74.63%NM 72.31%3.2%2026-05-21 07:40