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How accurate are the Champions League odds?

The closing prices of 878 finished games since Tue 14 Sep 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

878 games, 2 bookmakers
  • Closing favourite won 61% 535 of 878 games
  • Market Brier score 0.514 0 is perfect; a coin flip scores 0.667
  • Average closing payout 94.5% 100% minus the bookmakers' margin
  • Games covered 878 Tue 14 Sep 2021 to Wed 14 Oct 2026

150 of the 1,028 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 3.7% of 187 selections 10-20% chance: happened 13.6% of 501 selections 20-30% chance: happened 22.0% of 849 selections 30-40% chance: happened 38.6% of 332 selections 40-50% chance: happened 45.0% of 229 selections 50-60% chance: happened 63.2% of 185 selections 60-70% chance: happened 67.9% of 168 selections 70-80% chance: happened 80.0% of 115 selections 80-90% chance: happened 89.7% of 58 selections 100% 0%
Market said 0%100%
Happened
Market chancePriceSelectionsMarket saidHappenedDiff
0-10% 10.00 or longer 187 6.9% 3.7% -3.2 pts
10-20% 5.00 to 10.00 501 15.6% 13.6% -2.0 pts
20-30% 3.33 to 5.00 849 25.1% 22.0% -3.1 pts
30-40% 2.50 to 3.33 332 34.5% 38.6% +4.1 pts
40-50% 2.00 to 2.50 229 44.9% 45.0% +0.1 pts
50-60% 1.67 to 2.00 185 55.1% 63.2% +8.1 pts
60-70% 1.43 to 1.67 168 65.1% 67.9% +2.8 pts
70-80% 1.25 to 1.43 115 75.0% 80.0% +5.0 pts
80-90% 1.11 to 1.25 58 85.3% 89.7% +4.4 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 46.0% 49.0% +3.0 pts
Draw 22.4% 18.3% -4.1 pts
Away win 31.6% 32.7% +1.1 pts

The market's average closing chance for each outcome over all 878 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 750 0.503 0.000 94.5%
Bet365 792 0.515 +0.001 94.7%

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 878 finished Champions League games since 2021, the closing favourite won 61% of the time. The market's closing chance, with the bookmakers' margin removed, gave the home side 46.0% on average and home wins happened 49.0% 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 0.514 in this league; the lowest single bookmaker is Unibet at 0.503. 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 5.5% here, still has to be cleared: the closing line value calculator shows what a price needs to beat.