Referee.Observer
RefereesTeamsMatchesCompetitions
Referee.Observer

Explore

RefereesTeamsMatchesCompetitionsSearch
Referees/United States/Katja Koroleva/All Matches

Katja Koroleva

7 total assignments

7 matches (filtered)
Major League Soccer26/07/2025
Real Salt Lake2–1SJ Earthquakes
📺VAR
2025
Major League Soccer19/07/2025
Columbus Crew2–1D.C. United
⚽Referee
2025
Major League Soccer12/07/2025
Colorado Rapids3–0Vancouver W'caps
4️⃣Fourth Official
2025
Major League Soccer24/05/2025
Sporting KC3–3NE Revolution
📺VAR
2025
Major League Soccer05/04/2025
Vancouver W'caps2–0Colorado Rapids
⚽Referee
2025
Major League Soccer01/03/2025
NY Red Bulls2–0Nashville SC
📺VAR
2025
Major League Soccer23/02/2025
Portland Timbers1–4Vancouver W'caps
4️⃣Fourth Official
2025
← Back to Profile
Referee.Observer

Referee appointments, match timelines and community verdicts from 100+ leagues — updated daily from official sources.

⚖️ Judge incidentsBecome a referee

Explore

  • Referees
  • Teams
  • Matches
  • Upcoming fixtures
  • Competitions
  • Strictest referees
  • Compare referees
  • Network graph

Community

  • Incident feedJudge
  • Observer leaderboard
  • Become a referee
  • Referee AI Assistant
  • Mobile & watch apps

Solutions

  • For referees
  • For federations
  • For leagues
  • For organizers
  • For clubs
  • For media
  • For fans
  • Data & betting API

Referee Store

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

Company

  • About us
  • Methodology
  • API documentation
  • Contact & white-label

© 2026 Referee.Observer. All rights reserved.

Data updated dailyPrivacyTerms