Lab

Where was Vesta right, and where wrong?

Over 38 league matches of Ajaccio since 2017-18, each forecast by a model that had not seen that season, Vesta's likeliest result happened 58 times in 100; it said 51. Draws: said 26, happened 13 in 100.

Since its public record began on 30 Sep 2026: 51 league matches settled, the likeliest result happened 61 times in 100 (Vesta said 50). Every published forecast

League data to · Vesta · out of sample, 2017-18 on

Free
Matches38each forecast before its season
Likeliest result happened58 in 100Vesta said 51
Draws13 in 100Vesta said 26
Goals a match2.55Vesta expected 2.67
Likeliest score happened3 in 100Vesta said 14

When Vesta says N in 100, does it happen N times?Said v happened

every home win, draw and away win chance, grouped in bands of 10; on the line = exactly right
00252550507575100100 Vesta said (in 100)
Chance bandChancesSaidHappenedGap
20–30 in 1003727.216.2−11.0
30–40 in 1003034.440.0+5.6

The biggest surprises

results Vesta gave the least chance that happened
  1. Ajaccio 1-0 MarseilleSat 3 Jun 2023 · Ligue 110 in 100
  2. Marseille 1-2 AjaccioSat 8 Oct 2022 · Ligue 114 in 100
  3. Ajaccio 1-3 Clermont FootSun 2 Oct 2022 · Ligue 124 in 100
  4. Ajaccio 0-0 ToulouseSun 7 May 2023 · Ligue 128 in 100
  5. Ajaccio 0-0 LensSun 14 Aug 2022 · Ligue 129 in 100
  6. Troyes 1-1 AjaccioSun 16 Oct 2022 · Ligue 129 in 100
  7. Ajaccio 4-2 StrasbourgSat 5 Nov 2022 · Ligue 129 in 100
  8. Nantes 2-2 AjaccioSun 13 Nov 2022 · Ligue 129 in 100
  9. Angers 1-2 AjaccioWed 1 Feb 2023 · Ligue 130 in 100
  10. Ajaccio 0-0 BrestSun 23 Apr 2023 · Ligue 130 in 100
  11. Ajaccio 0-1 LorientSun 4 Sep 2022 · Ligue 130 in 100
  12. Auxerre 1-0 AjaccioSun 30 Oct 2022 · Ligue 130 in 100

The surest calls that missed

the strongest favourites that did not win
  1. Ajaccio 1-0 MarseilleSat 3 Jun 2023 · away win said71 in 100
  2. Marseille 1-2 AjaccioSat 8 Oct 2022 · home win said63 in 100
  3. Ajaccio 0-0 ToulouseSun 7 May 2023 · away win said47 in 100
  4. Ajaccio 1-3 Clermont FootSun 2 Oct 2022 · home win said47 in 100
  5. Ajaccio 0-1 LorientSun 4 Sep 2022 · home win said41 in 100
  6. Ajaccio 4-2 StrasbourgSat 5 Nov 2022 · away win said41 in 100
  7. Angers 1-2 AjaccioWed 1 Feb 2023 · home win said41 in 100
  8. Auxerre 1-0 AjaccioSun 30 Oct 2022 · away win said40 in 100
  9. Troyes 1-1 AjaccioSun 16 Oct 2022 · home win said40 in 100
  10. Nantes 2-2 AjaccioSun 13 Nov 2022 · home win said38 in 100
  11. Ajaccio 0-0 LensSun 14 Aug 2022 · away win said38 in 100
  12. Ajaccio 0-1 MontpellierSun 12 Mar 2023 · home win said38 in 100

Which clubs beat Vesta's expectationsClubs v Vesta

points won against the points Vesta's forecasts gave (3 × win + draw), these matches
Underrated: more points than expected
ClubMatchesPointsExpectedGap
Auxerre262.5+3.5
Clermont Foot262.7+3.3
Montpellier262.8+3.2
Lorient262.8+3.2
Reims263.4+2.6
Nice263.7+2.3
Lille263.8+2.2
Monaco263.9+2.1
Rennes264.2+1.8
Lyon264.6+1.4
Paris Saint Germain264.8+1.2
Nantes242.9+1.1
Overrated: fewer points than expected
ClubMatchesPointsExpectedGap
Ajaccio382639.5−13.5
Marseille204.4−4.4
Angers202.5−2.5
Brest212.7−1.7
Troyes212.6−1.6
Strasbourg233.4−0.4
Lens244.00.0
Toulouse243.1+0.9
Nantes242.9+1.1
Paris Saint Germain264.8+1.2
Lyon264.6+1.4
Rennes264.2+1.8

League by league, season by seasonLeague by league

Ajaccio's matches; the current season so far
CSV
SeasonLeagueMatchesLikeliest saidHappenedDraws saidDrawsGoals expectedGoalsRPS
2022-23Ligue 138515826132.672.550.200

Each season from 2017-18 was hidden from Vesta and forecast with a model fitted only on the seasons before it, the same model that publishes today's forecasts (checked Tue 13 Oct 2026). These are the forecasts of past seasons, not the published ones: the public record of forecasts made before kick-off starts on 30 Sep 2026 and lives in Vesta's track record.

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