FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Portrait of Xavi Simons

Xavi

Simons

AMNetherlands · Tottenham Hotspur

№ 566931World Class €38.1M +0.05

Image: FootyLogos

Player dossierPremier League

XaviSimons

AMAttacking MidfieldMidfield

Club
Tottenham Hotspur
League
Premier League
Nationality
Netherlands
Age
23
Height
179 cm
Foot
Right
Valued
3 Jun 2026

Reading the valuation

The market values Simons at €40M. Model A, which never saw Simons during training, estimates €38.1M: the market value is 5% above that estimate.

That is a factor of ×1.05. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €14.8M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▲ +0.05A €38.1M▲ +1.00B €14.8M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
76
Minutes
5,512
Goals
17
Assists
15
Started
62/76
Min / app
73
Cards
13Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Simons…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €40M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €40MModel A €38.1M

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 1,687 midfielders

Xavi Simons's percentiles among midfielders: Goals per 90 92nd, Assists per 90 91st, Minutes, two years 91st, Starts 73rd, Minutes, last 365 days 86th, European club minutes 79th92ndGoals91stAssists91stMinutes73rdStarts86thRecent79thEurope

Dashed ring: the midfielder median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.28 this player0.08 midfielder median92nd percentile

0.00peer deciles · median line · this player ●0.93

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation
€500k
Mar 2021
Peak
€80M
Mar 2024
Model target
€40M
Jun 2026
Valuations
19
4 club changes
Jun 2026€40MTottenham HotspurValuation the model is trained to reproduce

Jun 2026: €40M, Tottenham Hotspur. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2021-03-09€500kParis Saint-Germain U19
2021-06-04€500kParis Saint-Germain U19
2021-12-16€1.5MParis Saint-Germain U19
2022-03-23€3MParis Saint-Germain
2022-05-30€4MParis Saint-Germain
2022-09-14€8MPSV Eindhoven
2022-11-11€18MPSV Eindhoven
2023-03-17€30MPSV Eindhoven
2023-06-23€40MPSV Eindhoven
2023-10-18€70MRB Leipzig
2023-12-14€70MRB Leipzig
2024-03-27€80MRB Leipzig
2024-05-29€80MRB Leipzig
2024-12-20€80MRB Leipzig
2025-03-27€70MRB Leipzig
2025-06-05€70MRB Leipzig
2025-12-09€60MTottenham Hotspur
2026-03-09€50MTottenham Hotspur
2026-06-03€40MTottenham Hotspur

Audit context group-level, not about this player

Audit group
UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
+0.049

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Premier League555 players · median €18M

Valued above 83% of the 555 Premier League players.

€150k€1M€7.5M€50M€40MSee them in the Explorer →

Midfielders, all leagues1,687 players · median €2M

Valued above 96% of the 1,687 midfielders.

€20k€200k€2M€20M€40MSee them in the Explorer →

Where Simons appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).