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Devin Kupka

Oni Böblingen

W–L
6–8
Won and lost rating-eligible matches in the past 12 months.
Gi
1,230
Rating based on Gi matches in the past 12 months.
No-Gi
1,280
Rating based on No-Gi matches in the past 12 months.
Current form
5–5
Results from the ten most recent rating-eligible matches.
Opponents
9
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

5
Events
Date Event Result Format Division
NAGA Germany Grappling Championship Germany · Gi · 12–13 yo · 50–54.9 kg ; No-Gi · 12–13 yo · 50–54.9 kg 0–4 W–L: Win / Loss GiNo-Gi
  • Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Southside Battle Trials 2026 - Kinder und Jugendliche Germany · Gi · U13 · ≤55 kg ; No-Gi · U13 · ≤53 kg 5–1 W–L: Win / Loss GiNo-Gi
  • U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
  • U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Grappling Industries NUREMBERG Germany · No-Gi · 12–13 yo · yellow/orange · ≤115 lb 1–3 W–L: Win / Loss No-Gi
  • Place #5
Southside Battle Trials 2025 - Kinder und Jugendliche Germany · U13 · ≤45 kg 1–1 W–L: Win / Loss
  • U13 - male NoGi / U13 - Male Gi - Alter 10 Jahre bis 12 Jahre / -45 kg
ADCC West European Open 2024 Germany · No-Gi · 11–14 yo · ≤40 kg 0–1 W–L: Win / Loss No-Gi
  • Place #5

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 0 Rating 1,328

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 0
Events
3 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 0 Rating 1,328

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 0
Events
3 0

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

June 2026 No new matches Change +2 Rating 1,328

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 0
Events
3 0

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

May 2026 10 new matches Change +182 Rating 1,326

Rating-period composition

Rating matches
14 +10
Record
6–8 Previous month 1–3
Opponents
9 +5
Events
3 +2

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
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Submission 02:41 0–9
Marginal influence -5
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–9
Marginal influence -5
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–7
Marginal influence -7
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–2
Marginal influence -7
Win
May 10, 2026 Finn Pohlmann
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 01:01 4–0
Marginal influence +16
Win
May 10, 2026 Kacper Sobczak
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 00:29 2–0
Marginal influence +16
Win
May 10, 2026 Njegoš Irić
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 00:30 5–0
Marginal influence +15
Win
May 10, 2026 Kevin Wiedemann
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Submission 00:36 6–0
Marginal influence +9
Loss
May 10, 2026 Kacper Sobczak
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Disqualification 00:09 0–0
Marginal influence -10
Win
May 10, 2026 Njegoš Irić
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Submission 01:31 2–0
Marginal influence +7
April 2026 No new matches Change +1 Rating 1,144

Rating-period composition

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

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

March 2026 4 new matches · 1 left period Change +13 Rating 1,143

Rating-period composition

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

1 older matches left the 12-month period: 0 won and 1 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

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 14, 2026 Joshua Schmidt
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 02:24 0–17
Marginal influence -12
Loss
March 14, 2026 Lukas Schnabel
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Points 03:00 2–12
Marginal influence -16
Loss
March 14, 2026 Zaur Fotiadi
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 00:36 0–6
Marginal influence -12
Win
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 01:14 6–0
Marginal influence +10
Relevant matches
9.8
Official ranking percentile
Top 51%
Performance
2.7 pp above expectation

9.8 weighted matches against 9 different opponents across 3 events

Weighted win rate
46.1%
Expected win rate
43.4%
Average opponent rating
1,368
Repeated-opponent share
35.7%
Network connectivity
80.9%

Classification evidence

Why U14?

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

  • U14 3 event votes Selected outcome

Registrations and outcomes

NAGA Germany Grappling Championship
U14 · Counts
2 Adult 13 & Up Spectator tickets
Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Southside Battle Trials 2026 - Kinder und Jugendliche
U14 · Counts
U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
  • Competition age 13
  • Registered age: u12
  • Source category: u12
U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
  • Competition age 13
  • Registered age: u12
  • Source category: u12
Grappling Industries NUREMBERG
U14 · Counts
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Southside Battle Trials 2025 - Kinder und Jugendliche
Does not count
U13 - male NoGi / U13 - Male Gi - Alter 10 Jahre bis 12 Jahre / -45 kg
  • Competition age 12
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 52 kg?

This outcome uses at most one unambiguous upper weight limit per completed ranking event from 2025-09-01 through 2026-08-31. Only the three most recent eligible events are considered, and the lightest verified upper limit is selected. A higher division is not treated as measured body weight.

Evidence outcome

  • ≤ 52 kg 1 competition event Selected outcome
  • ≤ 55 kg 1 competition event

Registrations and outcomes

NAGA Germany Grappling Championship
Does not count
2 Adult 13 & Up Spectator tickets

No matches in the rating period · no valid weight evidence

NAGA Germany Grappling Championship
≤ 55 kg · Counts as a competition event
Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Registered weight class: 50 - 54.9
  • Source competition limit: 50 - 54.9

2 matches in the rating period

NAGA Germany Grappling Championship
≤ 55 kg · Counts as a competition event
Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Registered weight class: 50 - 54.9
  • Source competition limit: 50 - 54.9

2 matches in the rating period

Southside Battle Trials 2026 - Kinder und Jugendliche
≤ 53 kg · Does not count
U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
  • Registered weight class: -53 kg
  • Source competition limit: -53 kg

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

Southside Battle Trials 2026 - Kinder und Jugendliche
≤ 55 kg · Does not count
U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

Grappling Industries NUREMBERG
≤ 52 kg · Counts as a competition event
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Registered weight class: -115 lbs
  • Source competition limit: -115 lbs

4 matches in the rating period

Southside Battle Trials 2025 - Kinder und Jugendliche
Does not count
U13 - male NoGi / U13 - Male Gi - Alter 10 Jahre bis 12 Jahre / -45 kg
  • Registered weight class: -45 kg
  • Source competition limit: -45 kg

No matches in the rating period · no valid weight evidence

Classification evidence

Why Orange?

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

  • orange 4 matches in the rating period Selected outcome

Registrations and outcomes

Grappling Industries NUREMBERG
orange · Counts as a match
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Source belt category: orange

4 matches in the rating period