Joost Koster

Nijmegen Open BJJ 2026 2026-05-30

🥉 3rd Male / Blue / Masters 2 (40+) / -94,3 kg (Heavy)

• Lost vs Mark Kreijkes (Team Kaishin HQ)
  Masters blue absolute · Round 3 · points
• Lost vs Xaverio Inge (Jiu Jitsu Factory)
  Masters blue absolute · Round 2 · submission
• Lost vs Pawel Klak (Renzo Gracie Holland)
  Male / Blue / Masters 2 (40+) / -94,3 kg (Heavy) · Round 4 · submission
• Lost vs Xaverio Inge (Jiu Jitsu Factory)
  Male / Blue / Masters 2 (40+) / -94,3 kg (Heavy) · Round 5 · points
• Won vs Joannes Van Staveren (Marshlands Jiu Jitsu)
  Male / Blue / Masters 2 (40+) / -94,3 kg (Heavy) · Round 2 · points
• Won vs André Swaluw (Bjj Delft)
  Male / Blue / Masters 2 (40+) / -94,3 kg (Heavy) · Round 1 · submission

Grappling Industries AMSTERDAM 2025-08-02

🥉 3rd No Gi Adult / Male / Beginner (White) / Master (30+) / -200 lbs · 🥈 2nd Gi Adult / Male / White / Senior (40+) / -200 lbs

• Lost vs Bogdan Burdujoc (COMBAT BROTHERS)
  No Gi Adult / Male / Beginner (White) / Master (30+) / -200 lbs · Round 3 · submission
• Lost vs Karim Elaasar (Amsterdam Training Center / Tatsujin Amsterdam)
  No Gi Adult / Male / Beginner (White) / Master (30+) / -200 lbs · Round 2 · submission
• Won vs Mateo Hahn (Dodo Team)
  No Gi Adult / Male / Beginner (White) / Master (30+) / -200 lbs · Round 1 · points
• Lost vs Da Rosa Moraes Ronaldo (Zanshin Dojo Hamburg)
  Gi Adult / Male / White / Senior (40+) / -200 lbs · Round 2 · points
• Lost vs Da Rosa Moraes Ronaldo (Zanshin Dojo Hamburg)
  Gi Adult / Male / White / Senior (40+) / -200 lbs · Round 1 · submission
• Lost vs Youssef Ameziane (Panthers' Club Lille)
  Absolute Gi / Male / White / Masters & Seniors · Round 1 · double-dq
• Lost vs Janis Kogutics (Jiu-Jitsu Team Jelgava/A-Force BJJ)
  Absolute No Gi - All Levels / Male / Masters & Seniors · Round 1 · walkover

Boa - Battles Of Apeldoorn 2 2025-06-28

• Lost vs Andrei Banu (Roger Gracie Amsterdam)
  Male Gi / White / -94,3 kg (Heavy) / Adult · Round 2 · points
• Lost vs Roberto Bloemert (Brazilian Power Team Marseille - NL)
  Male Gi / White / -94,3 kg (Heavy) / Adult · Round 2 · submission

International Veluwe Open Jiu Jitsu Championship 2025 (GI) 2025-05-10

• Lost vs Dean Stavenuiter (Gracie Barra Amsterdam / Gym Hoofddorp)
  MALE GI / WHITE / ABSOLUTES MASTERS 1 · Round 2 · points
• Lost vs Casper Hazeveld (Bushido BJJ)
  MALE GI / WHITE / ABSOLUTES MASTERS 1 · Round 1 · points

Kaizen League Amsterdam Gi and No-Gi 2025-03-01

• Lost vs Erik De Klerck (Brazilian Jiu Jitsu Academy Amsterdam)
  Male Gi / White / Master 1 (30+) / -94,3 kg (Heavy) · Round 1 · submission

Boa - Battles Of Apeldoorn 2024-05-11

🥉 3rd Male Gi / White / +100,5 kg (Ultra heavy) / Adult

• Lost vs Maksym Mykal (Marshlands Jiu Jitsu)
  Male Gi / White / +100,5 kg (Ultra heavy) / Adult · Round 2 · submission
• Lost vs Robin Verheugd (Brazilian Power Team Marseille - NL)
  Male Gi / White / +100,5 kg (Ultra heavy) / Adult · Round 1 · submission