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How accurate are the Champions League odds?

The closing prices of 598 finished games since Wed 17 Nov 2021, set against what happened: the chance the market gave, with the bookmakers' margin removed, next to how often it came in. A record of what the market did, not a tip.

The market's record

598 games, 2 bookmakers
  • Closing favourite won 71% 424 of 598 games
  • Market Brier score 0.397 0 is perfect; a coin flip scores 0.667
  • Average closing payout 93.5% 100% minus the bookmakers' margin
  • Games covered 598 Wed 17 Nov 2021 to Thu 15 Oct 2026

3 of the 601 games finished in that time are left out: no bookmaker had a closing price on every outcome.

Market chance against what happened

0-10% chance: happened 4.7% of 466 selections 10-20% chance: happened 12.1% of 389 selections 20-30% chance: happened 24.7% of 166 selections 30-40% chance: happened 31.4% of 121 selections 40-50% chance: happened 43.8% of 128 selections 50-60% chance: happened 53.6% of 110 selections 60-70% chance: happened 66.7% of 144 selections 70-80% chance: happened 80.6% of 108 selections 80-90% chance: happened 92.9% of 126 selections 90-100% chance: happened 97.2% of 36 selections 100% 0%
Market said 0%100%
Happened
Market chancePriceSelectionsMarket saidHappenedDiff
0-10% 10.00 or longer 466 7.1% 4.7% -2.4 pts
10-20% 5.00 to 10.00 389 12.5% 12.1% -0.4 pts
20-30% 3.33 to 5.00 166 24.7% 24.7% 0.0 pts
30-40% 2.50 to 3.33 121 34.9% 31.4% -3.5 pts
40-50% 2.00 to 2.50 128 45.1% 43.8% -1.3 pts
50-60% 1.67 to 2.00 110 55.2% 53.6% -1.6 pts
60-70% 1.43 to 1.67 144 65.1% 66.7% +1.6 pts
70-80% 1.25 to 1.43 108 74.5% 80.6% +6.1 pts
80-90% 1.11 to 1.25 126 85.3% 92.9% +7.6 pts
90-100% 1.11 or shorter 36 92.0% 97.2% +5.2 pts

Every priced outcome of every game is one selection. "Market said" is the bookmakers' average implied probability with the margin removed; "Happened" is how often that outcome came in. On the diagonal the market was right on average; above it, that kind of result happened more often than the prices said. Bands with fewer than 30 selections are left out.

Home, draw and away

OutcomeMarket saidHappenedDiff
Home win 53.5% 54.0% +0.5 pts
Draw 9.0% 8.9% -0.1 pts
Away win 37.6% 37.1% -0.5 pts

The market's average closing chance for each outcome over all 598 games against the share of games it won, settled on the regular-time score. "Home" is the first-named side.

Bookmaker accuracy

lower is better
BookmakerGamesBrier scorevs market averagePayout
Unibet 537 0.399 -0.002 92.9%
Bet365 485 0.409 +0.008 94.2%

Each bookmaker's own closing prices, margin removed, scored against the results of the games it priced; "vs market average" compares it with the bookmakers' average on the same games, so a negative figure means its prices were the closer. Bookmakers with fewer than 50 priced games are left out. Differences of a few thousandths are noise; a much higher score usually means the bookmaker's last price was captured well before the start, so it is the price in our archive being scored, not the trader.

Odds accuracy FAQ

How accurate are Champions League odds?
Across 598 finished Champions League games since 2021, the closing favourite won 71% of the time. The market's closing chance, with the bookmakers' margin removed, gave the home side 53.5% on average and home wins happened 54.0% of the time. The bands above show the same comparison price by price: a well-calibrated market has outcomes happening about as often as its prices say.
What is a Brier score?
The squared distance between the chances a bookmaker's prices gave and what happened, averaged over games: 0 would be perfect foresight, and on a three-way market a coin-flip price scores 0.667. The market average's closing prices score 0.397 in this league; the lowest single bookmaker is Unibet at 0.399. Differences of a few thousandths between bookmakers are noise, not skill.
Does a well-calibrated market mean the odds cannot be beaten?
Calibration says the market is right on average, not on every game. A band where outcomes happened more often than the prices said is where the closing market under-priced that kind of result over these seasons, which is often the draw or the outsider. The bookmaker's margin, about 6.5% here, still has to be cleared: the closing line value calculator shows what a price needs to beat.