Tanner
Tessmann
DMUnited States · Olympique Lyon
Player dossierLigue 1
TannerTessmann
DMDefensive MidfieldMidfield
- Club
- Olympique Lyon
- League
- Ligue 1
- Nationality
- United States
- Age
- 24
- Height
- 188 cm
- Foot
- Right
- Valued
- 1 Jun 2026
Ligue 1Reading the valuation
The market values Tessmann at €10M. Model A, which never saw Tessmann during training, estimates €13.9M: the market value is 28% below that estimate.
That is a factor of ×1.39. 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 €10.7M, 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.
- Apps
- 72
- Minutes
- 4,183
- Goals
- 3
- Assists
- 0
- Started
- 46/72
- Min / app
- 58
- 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 Tessmann…
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 €10M
Checking APIAsking 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
Dashed ring: the midfielder median (50th percentile)
European club minutes
Share of minutes played in UEFA club competitions.
24% this player0% midfielder median90th percentile
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
- €100k
- Oct 2019
- Peak
- €12M
- Dec 2025
- Model target
- €10M
- Jun 2026
- Valuations
- 18
- 3 club changes
Jun 2026: €10M, Olympique Lyon. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-10-25 | €100k | North Texas SC |
| 2020-08-26 | €600k | FC Dallas |
| 2020-12-18 | €1M | FC Dallas |
| 2021-07-09 | €1M | FC Dallas |
| 2021-10-14 | €2M | Venezia FC |
| 2021-12-28 | €2.5M | Venezia FC |
| 2022-06-07 | €2.5M | Venezia FC |
| 2022-12-22 | €2M | Venezia FC |
| 2023-06-12 | €2.4M | Venezia FC |
| 2023-12-27 | €3.2M | Venezia FC |
| 2024-03-25 | €4.5M | Venezia FC |
| 2024-06-03 | €7M | Venezia FC |
| 2024-12-10 | €6M | Olympique Lyon |
| 2025-06-03 | €6M | Olympique Lyon |
| 2025-10-10 | €10M | Olympique Lyon |
| 2025-12-15 | €12M | Olympique Lyon |
| 2026-03-27 | €10M | Olympique Lyon |
| 2026-06-01 | €10M | Olympique Lyon |
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
- −0.328
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 →Ligue 1423 players · median €5M
Valued above 66% of the 423 Ligue 1 players.
See them in the Explorer →Midfielders, all leagues1,687 players · median €2M
Valued above 78% of the 1,687 midfielders.
See them in the Explorer →Where Tessmann appears
- TerminalLigue 1 in the Player Explorer
- TerminalLigue 1 on the League Landscape
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- MinaminoLWAS Monaco · Ligue 1€10M
- TolissoCMOlympique Lyon · Ligue 1€10M
- Saint-MaximinLWRC Lens · Ligue 1€10M
- Maitland-NilesRBOlympique Lyon · Ligue 1€10M
- KovacicCMManchester City · midfielders€10M
- ZielinskiCMInter Milan · midfielders€10M
- EggesteinCMSC Freiburg · midfielders€10M
- LobotkaDMSSC Napoli · midfielders€10M
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).