Referee.Observer logoREFEREE.Observer
RefereesTeamsMatchesCompetitionsFeed
World Cup
LoginGet Started
REFEREE.Observer
FIFA World Cup 2026

Explore

RefereesTeamsMatchesCompetitionsFeedObserversStoreDevelopersSearch
Get Started FreeLogin
Referees/Marinus Koopman/UEFA Youth League
Competition Report

Marinus Koopman

UEFA Youth League
Appearances
6
Observer
6

Season-by-Season

SeasonTotalObs.
2025/2622

Teams officiated

  1. Borussia Dortmund
    3×
  2. AZ Alkmaar
    2×
  3. Aston Villa FC
    2×
  4. Athletic Club
    1×
  5. Celtic FC
    1×
  6. Juventus
    1×
  7. Manchester City FC
    1×
  8. Paris Saint Germain
    1×

Venues

  1. Dortmund
    2×
  2. Tamworth
    1×
  3. Wijdewormer
    1×

Most frequent crewmates

🇦🇹Alan Kijas1×🇦🇹Alexander Borucki1×🇧🇾Amine Kourgheli1×🇬🇪Davit Akhvlediani1×🇬🇪Davit Gabisonia1×🇽🇰Edmond Zeqiri1×🇳🇱Erwin Blank1×🇽🇰Fatmir Sekiraqa1×
First in this competition
Borussia Dortmund vs Athletic Club
01/10/2025
View match →
Most recent
AZ Alkmaar vs Aston Villa FC
09/12/2025
View match →

Recent matches

View all →
09/12/2025 · 2025/26
AZ AlkmaarvsAston Villa FC
Observer
01/10/2025 · 2025/26
Borussia DortmundvsAthletic Club
Observer
Borussia DortmundvsCeltic FC
Observer
Borussia DortmundvsParis Saint Germain
Observer
Aston Villa FCvsJuventus
Observer
AZ AlkmaarvsManchester City FC
Observer
Referee.Observer logoREFEREE.Observer

The world's most comprehensive platform for tracking referee appointments, judging key incidents and exploring officiating networks across football worldwide.

⚖️ Judge incidentsBecome a referee

Explore

  • Browse Referees
  • Competitions
  • Recent Matches
  • Incident Feed
  • Observer Leaderboard
  • Strictest Referees
  • Network Graph
  • Compare Referees

Resources

  • About Us
  • Methodology
  • API Documentation
  • Privacy Policy
  • Terms of Service

Referee Store

  • Shop kit & gear
  • Size guide
  • Shipping & returns
  • Track order
  • Clubs & bulk orders

© 2026 Referee.Observer. All rights reserved.

Data updated daily from official sources

·Privacy·Terms