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CH

Lenny Duc

ATLAS JJB

≤ 51 kg
W–L
9–1
Won and lost rating-eligible matches in the past 12 months.
Gi
1,436
Rating based on Gi matches in the past 12 months.
No-Gi
1,276
Rating based on No-Gi matches in the past 12 months.
Current form
9–1
Results from the ten most recent rating-eligible matches.
Opponents
7
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

5
Events
Date Event Result Format Division
NAGA Switzerland Grappling Championship CH · No-Gi · 14–15 yo · 50–54.9 kg 1–0 W–L: Win / Loss No-Gi
  • Teens No-Gi (Male) / Beginner / 50 - 54.9 / 14-15 years
ADCC Suisse Open Championship 2026 CH · No-Gi · 13–14 yo · ≤55 kg 1–0 W–L: Win / Loss No-Gi
  • BOYS / 13-14 years / -55 kg
Grappling Industries GENEVA CH · Gi · 14–15 yo · white · ≤115 lb ; No-Gi · 14–15 yo · white · ≤115 lb 4–0 W–L: Win / Loss GiNo-Gi
  • Gi Kids / 14 - 15 years (Male) / White / -115 lbs
  • No Gi Kids / 14 - 15 years (Male) / Beginner (White) / -115 lbs
GIRONA BJJ CUP GI & NO-GI 2026 ES · Gi · white · ≤51 kg ; No-Gi · white · ≤51 kg 2–1 W–L: Win / Loss GiNo-Gi
  • Kids Boys GI / White / Infanto Juvenil B / -51,0 kg
  • Kids Boys NO-GI / White / Infanto Juvenil B / -51,0 kg
Geneva Submission Series #3 CH · Gi · 13–17 yo · white/blue · ≤45 kg 2–0 W–L: Win / Loss Gi
  • Geneva Submission Series #3 White & Blue Belts / -45 kg / White Belt / Male / 13-17 years

Calculation details

Rating breakdown for the past 12 months

See the published month-end rating and the rating-eligible matches added in each month. Open a month for details.

August 2026 No new matches Change +5 Rating 1,439

Rating-period composition

Rating matches
10 0
Record
9–1 Previous month 9–1
Opponents
7 0
Events
4 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

July 2026 No new matches Change +1 Rating 1,434

Rating-period composition

Rating matches
10 0
Record
9–1 Previous month 9–1
Opponents
7 0
Events
4 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

June 2026 1 new match Change +10 Rating 1,433

Rating-period composition

Rating matches
10 +1
Record
9–1 Previous month 8–1
Opponents
7 +1
Events
4 +1

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Win
ADCC Suisse Open Championship 2026 BOYS / 13-14 years / -55 kg
Method Submission 03:49 0–0
Marginal influence +1
May 2026 4 new matches Change +67 Rating 1,423

Rating-period composition

Rating matches
9 +4
Record
8–1 Previous month 4–1
Opponents
6 +3
Events
3 +1

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Win
Grappling Industries GENEVA No Gi Kids / 14 - 15 years (Male) / Beginner (White) / -115 lbs
Method Submission 01:00 4–0
Marginal influence +5
Win
May 23, 2026 Milo Buet
Grappling Industries GENEVA No Gi Kids / 14 - 15 years (Male) / Beginner (White) / -115 lbs
Method Submission 00:29 2–0
Marginal influence -2
Win
May 23, 2026 Salim Koch
Grappling Industries GENEVA Gi Kids / 14 - 15 years (Male) / White / -115 lbs
Method Submission 00:15 0–0
Marginal influence +19
Win
May 23, 2026 Milo Buet
Grappling Industries GENEVA Gi Kids / 14 - 15 years (Male) / White / -115 lbs
Method Submission 00:29 0–0
Marginal influence +13
April 2026 No new matches Change -7 Rating 1,356

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
3 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

March 2026 5 new matches Change Starting point Rating 1,363

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Loss
March 8, 2026 David Cortés Díaz
GIRONA BJJ CUP GI & NO-GI 2026 Kids Boys NO-GI / White / Infanto Juvenil B / -51,0 kg
Method Disqualification 00:24 0–0
Marginal influence -40
Win
March 8, 2026 David Cortés Díaz
GIRONA BJJ CUP GI & NO-GI 2026 Kids Boys GI / White / Infanto Juvenil B / -51,0 kg
Method Submission 00:37 0–0
Marginal influence +21
Win
March 8, 2026 Joao Miguel Pires
GIRONA BJJ CUP GI & NO-GI 2026 Kids Boys GI / White / Infanto Juvenil B / -51,0 kg
Method Submission 03:16 0–0
Marginal influence +16
Win
March 1, 2026 Lyam Soler
Geneva Submission Series #3 Geneva Submission Series #3 White & Blue Belts / -45 kg / White Belt / Male / 13-17 years
Method Submission 0–0
Marginal influence +16
Win
March 1, 2026 Lyam Soler
Geneva Submission Series #3 Geneva Submission Series #3 White & Blue Belts / -45 kg / White Belt / Male / 13-17 years
Method Submission 01:23 0–0
Marginal influence +16
Relevant matches
8.2
Official ranking percentile
Top 18%
Performance
28.8 pp above expectation

8.2 weighted matches against 7 different opponents across 4 events

Weighted win rate
87.9%
Expected win rate
59.0%
Average opponent rating
1,246
Repeated-opponent share
30.0%
Network connectivity
80.9%

Classification evidence

Why U16?

Within the published period from 2025-09-01 through 2026-08-31, only competition ages recorded at events in the calculation year determine this outcome, with at most one vote per event. Without such an age, the most recent unambiguous earlier competition age is projected to the calculation year; bracket evidence is the final fallback. The newest evidence breaks a tie.

Evidence outcome

  • U16 4 event votes Selected outcome

Registrations and outcomes

ADCC Suisse Open Championship 2026
U16 · Counts
BOYS / 13-14 years / -55 kg
  • Competition age 15
Grappling Industries GENEVA
U16 · Counts
No Gi Kids / 14 - 15 years (Male) / Beginner (White) / -115 lbs
  • Competition age 15
  • Registered age: u16
  • Source category: u16
Gi Kids / 14 - 15 years (Male) / White / -115 lbs
  • Competition age 15
  • Registered age: u16
  • Source category: u16
GIRONA BJJ CUP GI & NO-GI 2026
U16 · Counts
Kids Boys NO-GI / White / Infanto Juvenil B / -51,0 kg
  • Competition age 15
  • Registered age: u16
  • Source category: u16
Kids Boys GI / White / Infanto Juvenil B / -51,0 kg
  • Competition age 15
  • Registered age: u16
  • Source category: u16
Geneva Submission Series #3
U16 · Counts
Geneva Submission Series #3 White & Blue Belts / -45 kg / White Belt / Male / 13-17 years
  • Competition age 15

Classification evidence

Why White?

This outcome uses the belt category of every rating-eligible match from 2025-09-01 through 2026-08-31. The most-fought category is selected; the newest evidence breaks a tie.

Evidence outcome

  • white 9 matches in the rating period Selected outcome

Registrations and outcomes

Grappling Industries GENEVA
white · Counts as a match
No Gi Kids / 14 - 15 years (Male) / Beginner (White) / -115 lbs
  • Source belt category: white

2 matches in the rating period

Grappling Industries GENEVA
white · Counts as a match
Gi Kids / 14 - 15 years (Male) / White / -115 lbs
  • Source belt category: white

2 matches in the rating period

GIRONA BJJ CUP GI & NO-GI 2026
white · Counts as a match
Kids Boys NO-GI / White / Infanto Juvenil B / -51,0 kg
  • Source belt category: white

1 match in the rating period

GIRONA BJJ CUP GI & NO-GI 2026
white · Counts as a match
Kids Boys GI / White / Infanto Juvenil B / -51,0 kg
  • Source belt category: white

2 matches in the rating period

Geneva Submission Series #3
white · Counts as a match
Geneva Submission Series #3 White & Blue Belts / -45 kg / White Belt / Male / 13-17 years
  • Source belt category: white

2 matches in the rating period