Big Jens
Jens Siu Wing Uong
Fightzone Berlin4 years on the mats
55 profile views · Last seen 4 month(s) ago
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About
- Training since first belt4 year(s) and 9 month(s)
- AcademyFightzone Berlin Verified
- AffiliationCheckmat
Achievements
0 of 18 unlockedProfile manually reviewed & certificate issued
Current rank verified by promoting instructor
Name verified by credit card
Verifications received6 / 10
102550
Years trained4 / 5
5101520
Gold medals0 / 5
51025
Competition matches0 / 10
1050100
Forum posts0 / 500
5001,000
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Promotion history
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- 10 months, 1 day
Blue belt Current belt
November 30, 2025Fightzone Berlin
Promoted byMarkus SchmidtTogether withJack Clover 
3 years, 10 months, 29 daysWhite belt
January 1, 2022Fightzone Berlin
- Stripe 1October 23, 2022
- Stripe 2January 23, 2023
- Stripe 3April 23, 2023
- Stripe 4April 23, 2024
Votes received for current rank
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"Jens Siu Wing Uong's ("Big Jens") blue belt progression aligns with IBJJF customary minimums, with nearly 4 years from white start in January 2022 to promotion in November 2025. Smoothcomp confirms his blue belt achievement around December 2025, with prior white belt competitions including 3rd place at IBJJF Dublin Open 2025 adult light-feather (pre-promotion). Instructors Markus Schmidt (black belt per his Instagram) and Jack Clover (black belt via personal site) hold sufficient rank at Fightzone Berlin/Checkmat. No discrepancies found as of my Jan-2026 review of his blue belt. Legit!"
"Great human being ! True martial artist ! "
"Verified via smoothcomp! Legit bluebelt, legit lineage and coaches! Gratulation zum Blaugurt!"
"Photo evidence of promotion and good time in grade "
"Great training partner. Fun Rolls and great person! "
"Oss Jens! Great training partner!"
