FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Patrick

Sequeira

GKCosta Rica · Casa Pia AC

№ 378482Established €1.9M +0.59

Player dossierLiga Portugal

PatrickSequeira

GKGoalkeeperGoalkeeper

Club
Casa Pia AC
League
Liga Portugal
Nationality
Costa Rica
Age
27
Height
190 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Sequeira at €3.5M. Model A, which never saw Sequeira during training, estimates €1.9M: the market value is 80% above that estimate.

That is a factor of ×1.80. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.

Without league and club, Model B estimates €3.6M, closer to the market here, although it is usually further off (typical miss ×2.07).

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

▲ +0.59A €1.9M▼ −0.03B €3.6M
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
61
Minutes
5,408
Started
61/61
Min / app
89
Cards
7Y 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 Sequeira…

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 €3.5M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €3.5MModel A €1.9M

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 485 goalkeepers

Patrick Sequeira's percentiles among goalkeepers: Minutes, two years 81st, Starts 62nd, Minutes, last 365 days 69th, European club minutes 32nd81stMinutes62ndStarts69thRecent32ndEurope

Dashed ring: the goalkeeper median (50th percentile)

Minutes, two years

Total club minutes in the two-year window: how much the player was used.

5,408 this player2,790 goalkeeper median81st percentile

450peer deciles · median line · this player ●9,210

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
€50k
Jun 2017
Peak
€4M
May 2025
Model target
€3.5M
May 2026
Valuations
24
6 club changes
May 2026€3.5MCasa Pia ACValuation the model is trained to reproduce

May 2026: €3.5M, Casa Pia AC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2017-06-24€50kDeportivo Saprissa
2018-01-01€50kReal Unión Club
2018-05-30€50kReal Unión Club
2019-02-19€50kReal Unión Club
2019-06-29€50kReal Unión Club
2019-09-10€50kReal Unión Club
2020-02-11€100kReal Unión Club
2020-10-08€100kCelta Vigo B
2021-01-07€100kCelta Vigo B
2021-06-30€150kReal Unión Club
2021-12-30€150kReal Unión Club
2022-06-29€150kReal Unión Club
2022-09-26€200kCD Lugo
2022-11-14€200kCD Lugo
2022-12-29€200kCD Lugo
2023-06-14€200kCD Lugo
2023-12-20€300kUD Ibiza
2024-06-17€300kUD Ibiza
2024-07-19€600kUD Ibiza
2024-12-19€1.5MCasa Pia AC
2025-03-31€3MCasa Pia AC
2025-05-30€4MCasa Pia AC
2025-12-18€3.5MCasa Pia AC
2026-05-28€3.5MCasa Pia AC

Audit context group-level, not about this player

Audit group
non-UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
+0.587

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 →

Liga Portugal423 players · median €1M

Valued above 71% of the 423 Liga Portugal players.

€20k€200k€2M€20M€3.5MSee them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 72% of the 485 goalkeepers.

€20k€200k€2M€20M€3.5MSee them in the Explorer →

Where Sequeira 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).