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
SeasonTotalAR4th
2025/261212—
2023/2444—
2021/2222—
2019/201—1
99—

Career Milestones

🎯
First tracked match
10/21/2019
RB Leipzig vs FC Zenit
UEFA Youth League
🌍
First international match
10/21/2019
RB Leipzig vs FC Zenit
UEFA Youth League
🏆
First Champions League match
10/19/2021
Club Atlético De Madrid vs Liverpool FC
Champions League

Match Activity

19 matches · 5 years
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
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

No matches found.

Top Destinations

  1. 1Alkmaar
    1×
  2. 2Almaty
    1×
  3. 3Bialystok
    1×
  4. 4Birmingham
    1×
  5. 5Eindhoven
    1×
  6. 6Ghent
    1×
  7. 7Glasgow
    1×
  8. 8Helsinki
    1×
  9. 9Istanbul
    1×
  10. 10Kopavogur
    1×

Career Events

Career events (UEFA courses, awards) will appear here when available.

Other Germany Officials

All Germany officials →

Season Reports

2025/26 (12)2023/24 (4)2021/22 (2)2019/20 (1) (9)