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João Perna

HOLY GROUND BJJ SQUAD

W–L
4–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,257
Rating based on Gi matches in the past 12 months.
No-Gi
-
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
6
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
1
Silver
2
Bronze
1
Total medals
4
Events with results
4

Full career record

Wins
5
Losses
5
Matches
10
Win rate
50.0%

Ways of winning

Submission
3
Points
2
Decision
0
Disqualification
0

Personal records

Longest winning streak
2
Longest submission streak
1
Longest gold streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
6
Distinct events
3

Ways of winning

  • Submission 3 60%
  • Points 2 40%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1257
Record
4–4
Win rate
50%
Submission share
60%

No-Gi

Rating
-
Record
-
Win rate
-
Submission share
-

Win quality

Grouped by pre-match win probability. This provides context and does not award an extra rating bonus.

As underdog 0–0 Less than 35% expected win probability before the match.
Even match 0–0 Between 35% and 65% expected win probability before the match.
As favourite 0–0 More than 65% expected win probability before the match.

Development

Rating and development

The same published rating, supported by trend, opponent strength and evidence quality.

Current rating
1,257
Change over 90 days
+10
Highest rating in 12 months
1,256
Performance versus expectation
+0.1 pp
Schedule strength
Top 63%
Average opponent rating
1,301
Weighted win rate
47%
Expected win rate
47%
Repeat-opponent share
25%
Effective evidence
5.3
Confidence
72/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–1 2–1 across 3 rematches against 1 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #978 Idris Aschemchel · Grappling Industries BERLIN Sub 01:03 5–0 Earlier · Sub 00:16 2–0 November 22, 2025 · Grappling Industries BERLIN

Full career

  1. #978 Idris Aschemchel · Grappling Industries BERLIN Sub 01:03 5–0 Earlier · Sub 00:16 2–0 November 22, 2025 · Grappling Industries BERLIN

Rivals

Opponent Head-to-head record Matches

Around this athlete

Athlete Rank Rating
Aaron Bellot #1083 1,257
João Perna #1084 1,257
Alryck KOUAME #1085 1,257

Recent tournaments

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 +3 Rating 1,257

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
6 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 1,254

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
6 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 1,254

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
6 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 3 new matches Change +11 Rating 1,256

Rating-period composition

Rating matches
8 +3
Record
4–4 Previous month 3–2
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
May 23, 2026 Mohammad Shamsi
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
Method Submission 01:01 4–0
Marginal influence +24
Loss
May 23, 2026 Leon Erkibaev
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
Method Submission 00:42 2–0
Marginal influence -23
Loss
May 23, 2026 Taron Seidler
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
Method Submission 00:19 0–0
Marginal influence -18
April 2026 No new matches Change +23 Rating 1,245

Rating-period composition

Rating matches
5 0
Record
3–2 Previous month 3–2
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 No new matches Change -24 Rating 1,222

Rating-period composition

Rating matches
5 0
Record
3–2 Previous month 3–2
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.

February 2026 2 new matches Change +25 Rating 1,246

Rating-period composition

Rating matches
5 +2
Record
3–2 Previous month 2–1
Opponents
3 +2
Events
2 +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
February 21, 2026 Karl Kaufner
Grappling Industries BERLIN Gi Kids / White / 10 - 11 years / -85 lbs
Method Points 03:00 6–2
Marginal influence +28
Loss
February 21, 2026 Ramil Recepli
Grappling Industries BERLIN Gi Kids / White / 10 - 11 years / -85 lbs
Method Submission 01:07 0–2
Marginal influence -26
January 2026 No new matches Change 0 Rating 1,221

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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.

December 2025 No new matches Change 0 Rating 1,221

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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.

November 2025 3 new matches Change Starting point Rating 1,221

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
November 22, 2025 Idris Aschemchel
Grappling Industries BERLIN Gi Kids / White / 10 - 11 years / -75 lbs
Method Submission 01:03 5–0
Marginal influence +16
Loss
November 22, 2025 Idris Aschemchel
Grappling Industries BERLIN Gi Kids / White / 10 - 11 years / -75 lbs
Method Points 03:00 0–2
Marginal influence -21
Win
November 22, 2025 Idris Aschemchel
Grappling Industries BERLIN Gi Kids / White / 10 - 11 years / -75 lbs
Method Submission 00:16 2–0
Marginal influence +16
Relevant matches
5.3
Official ranking percentile
Top 73%
Performance
0.1 pp above expectation

5.3 weighted matches against 6 different opponents across 3 events

Weighted win rate
47.0%
Expected win rate
46.9%
Average opponent rating
1,301
Repeated-opponent share
25.0%
Network connectivity
87.6%

Classification evidence

Why U12?

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

  • U12 2 event votes Selected outcome

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
U12 · Counts
Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12
Grappling Industries BERLIN
U12 · Counts
Gi Kids / White / 10 - 11 years / -85 lbs
  • Competition age 11
  • Registered age: u12
  • Source category: u12
Grappling Industries BERLIN
Does not count
Gi Kids / White / 10 - 11 years / -75 lbs
  • Competition age 10
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 34 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

  • ≤ 34 kg 1 competition event Selected outcome
  • ≤ 39 kg 2 competition events

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
≤ 34 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
  • Registered weight class: -34 kg
  • Source competition limit: -34 kg

3 matches in the rating period

Grappling Industries BERLIN
≤ 39 kg · Counts as a competition event
Gi Kids / White / 10 - 11 years / -85 lbs
  • Registered weight class: -85 lbs
  • Source competition limit: -85 lbs

2 matches in the rating period

Grappling Industries BERLIN
≤ 34 kg · Does not count
Gi Kids / White / 10 - 11 years / -75 lbs
  • Registered weight class: -75 lbs
  • Source competition limit: -75 lbs

3 matches in the rating period · outside the three most recent unambiguous events

Classification evidence

Why Grey?

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

  • grey 5 matches in the rating period Selected outcome
  • white 5 matches in the rating period

Registrations and outcomes

Grappling Industries BERLIN
grey · Counts as a match
Gi Kids / Grey / 10 - 11 years / -85 lbs
  • Source belt category: grey

2 matches in the rating period

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
grey · Counts as a match
Boys Gi (under 16 y.o.) / Grey / 10-11 years / -34 kg
  • Source belt category: grey

3 matches in the rating period

Grappling Industries BERLIN
white · Counts as a match
Gi Kids / White / 10 - 11 years / -85 lbs
  • Source belt category: white

2 matches in the rating period

Grappling Industries BERLIN
white · Counts as a match
Gi Kids / White / 10 - 11 years / -75 lbs
  • Source belt category: white

3 matches in the rating period