Lasse Koslowski
🚩 Assistant RefereeGermany
Football match official with 28 appearances across 7 competitions.
Career Stats
Total Appearances28
🚩 As AR27
4️⃣ 4th Official1
🌍 International28
🏟️ Domestic0
Competitions7
Season-by-Season Activity
'19/20
1
'21/22
2
'23/24
4
'25/26
12
AR4th Official
| Season | Total | AR | 4th |
|---|---|---|---|
| 2025/26 | 12 | 12 | — |
| 2023/24 | 4 | 4 | — |
| 2021/22 | 2 | 2 | — |
| 2019/20 | 1 | — | 1 |
| 9 | 9 | — |
Career Milestones
Match Activity
19 matches · 5 yearsMay
Jun
Jul
Aug
Sep
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Nov
Dec
Jan
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Mar
Apr
May
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Jul
Aug
Sep
Oct
Nov
Dec
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Aug
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Dec
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M
W
F
Role:ARARNo match
Top 19% among Germany officials
Peer Benchmark
Match Count81%
Seasons Active73%
Competitions83%
Median in Germany: 3 matches · 1 season
Recent Matches
All 28 →Europa League03/12/2026
BOLOGNA FC 1909vsAS Roma
assistant2
Europa League02/19/2026
Pfk Ludogorets 1945vsFerencvárosi TC
assistant1
Champions League01/28/2026
PAFOS FCvsSK Slavia Praha
assistant1
Champions League12/10/2025
Club Brugge KVvsArsenal FC
assistant2
Champions League11/26/2025
Sporting CPvsClub Brugge KV
assistant1
Champions League11/05/2025
PAFOS FCvsVillarreal CF
assistant2
Europa Conference League10/23/2025
AZ AlkmaarvsŠK Slovan Bratislava
assistant1
FIFA WC European Qualifiers10/10/2025
ICELANDvsUKRAINE
assistant2
Europa League10/02/2025
Celtic FCvsSC Braga
assistant1
Europa League09/24/2025
PAOK FCvsMK MAKKABI TEL AVIV
assistant2
Most-Officiated Teams
Least-Officiated Teams
Current championship only · teams with fewest meetings
Top Destinations
Career Events
Career events (UEFA courses, awards) will appear here when available.