TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
DE

John Blumenthal

Fennec Jiu Jitsu

W–L
0–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,110
Rating based on Gi matches in the past 12 months.
No-Gi
1,101
Rating based on No-Gi matches in the past 12 months.
Current form
0–4
Results from the ten most recent rating-eligible matches.
Opponents
3
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

4
Indexed competition matches
Date Opponent Result Event Division
2026-04-11 Leon Daiber Tran
Loss
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi No-Gi · Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
2026-04-11 Taha Husseini
Loss
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi No-Gi · Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
2026-04-11 Halil Ibrahim Ünlü
Loss
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Gi · Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
2026-04-11 Taha Husseini
Loss
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Gi · Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg

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 1,192

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
3 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.

July 2026 No new matches Change +1 Rating 1,192

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
3 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.

June 2026 No new matches Change 0 Rating 1,191

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
3 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.

May 2026 No new matches Change -1 Rating 1,191

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
3 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.

April 2026 4 new matches Change Starting point Rating 1,192

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
April 11, 2026 Leon Daiber Tran
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
Method Submission 00:16 0–2
Marginal influence -18
Loss
April 11, 2026 Taha Husseini
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
Method Submission 00:17 0–6
Marginal influence -15
Loss
April 11, 2026 Halil Ibrahim Ünlü
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
Method Submission 00:31 0–0
Marginal influence -14
Loss
April 11, 2026 Taha Husseini
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
Method Submission 00:45 0–4
Marginal influence -8
Relevant matches
3.4
Official ranking percentile
-
Performance
-

3.4 weighted matches against 3 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,371
Repeated-opponent share
25.0%
Network connectivity
87.6%

Classification evidence

Why U10?

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

  • U10 1 event vote Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
U10 · Counts
Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10

Classification evidence

Why ≤ 27 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

  • ≤ 27 kg 1 competition event Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 27 kg · Counts as a competition event
Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Registered weight class: -27 kg
  • Source competition limit: -27 kg

2 matches in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 27 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Registered weight class: -27 kg
  • Source competition limit: -27 kg

2 matches in the rating period

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 4 matches in the rating period Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
white · Counts as a match
Boys No-Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Source belt category: white

2 matches in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
white · Counts as a match
Boys Gi (under 16 y.o.) / White / 8-9 years / -27 kg
  • Source belt category: white

2 matches in the rating period