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Ronja Staerke

Fennec Jiu Jitsu

W–L
8–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,387
Rating based on Gi matches in the past 12 months.
No-Gi
1,318
Rating based on No-Gi matches in the past 12 months.
Current form
7–3
Results from the ten most recent rating-eligible matches.
Opponents
9
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
3
Silver
5
Bronze
0
Total medals
8
Events with results
4

Full career record

Wins
8
Losses
5
Matches
13
Win rate
61.5%

Ways of winning

Submission
8
Points
0
Decision
0
Disqualification
0

Personal records

Longest winning streak
4
Longest submission streak
4
Longest gold streak
1

Recent recorded placements

  3. Fennec BJJ Kids Cup Gi & NoGi

    DE Event record 2–2

    • Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
    • Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
3
Unique opponents
9
Distinct events
3

Ways of winning

  • Submission 8 100%
  • Points 0 0%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1387
Record
5–1
Win rate
83%
Submission share
100%

No-Gi

Rating
1318
Record
3–2
Win rate
60%
Submission share
100%

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
1,428
Change over 90 days
+163
Highest rating in 12 months
1,426
Performance versus expectation
+18.5 pp
Schedule strength
Top 50%
Average opponent rating
1,325
Weighted win rate
73%
Expected win rate
54%
Repeat-opponent share
18%
Effective evidence
9.4
Confidence
91/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–4 2–4 across 6 rematches against 3 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #31 Amy Cumpelik · BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Sub 02:03 2–0
  2. #462 Sofia Aliakbar Beikchani · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Sub 00:38 6–0
  3. #1473 Arina Herb · BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Sub 00:23 0–0

Full career

  1. #31 Amy Cumpelik · BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Sub 02:03 2–0
  2. #462 Sofia Aliakbar Beikchani · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Sub 00:38 6–0
  3. #1473 Arina Herb · BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Sub 00:23 0–0

Rivals

Opponent Head-to-head record Matches
Anais S.Yagües 0–2 2
Mia Triebel 2–0 2
Salin Do 0–2 2

Around this athlete

Athlete Rank Rating
Ronja Staerke #297 1,428
Taron Seidler #298 1,427

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 1,428

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
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 -2 Rating 1,425

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
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 +1 Rating 1,427

Rating-period composition

Rating matches
11 0
Record
8–3 Previous month 8–3
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 3 new matches Change +64 Rating 1,426

Rating-period composition

Rating matches
11 +3
Record
8–3 Previous month 5–3
Opponents
9 +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 Arina Herb
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Girls Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
Method Submission 00:23 0–0
Marginal influence +9
Win
May 23, 2026 Polina Hodyna
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Girls Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
Method Submission 03:46 18–0
Marginal influence +15
Win
May 23, 2026 Amy Cumpelik
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Girls No-Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
Method Submission 02:03 2–0
Marginal influence +15
April 2026 4 new matches Change +67 Rating 1,362

Rating-period composition

Rating matches
8 +4
Record
5–3 Previous month 2–2
Opponents
6 +4
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.
Loss
April 11, 2026 Luna Fischer
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Girls No-Gi (under 16 y.o.) / Grey / 12-13 years / -52 kg
Method Points 2–3
Marginal influence -15
Win
April 11, 2026 Liliana Krawietz
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Girls No-Gi (under 16 y.o.) / Grey / 12-13 years / -52 kg
Method Submission 02:01 6–0
Marginal influence +8
Win
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Girls Gi (under 16 y.o.) / Grey / 12-13 years / -44 kg
Method Submission 00:38 6–0
Marginal influence +21
Win
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Girls Gi (under 16 y.o.) / Grey / 12-13 years / -44 kg
Method Submission 00:38 6–0
Marginal influence +10
March 2026 No new matches · 2 left period Change +26 Rating 1,295

Rating-period composition

Rating matches
4 -2
Record
2–2 Previous month 2–4
Opponents
2 -1
Events
1 -1

2 older matches left the 12-month period: 0 won and 2 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

February 2026 No new matches Change +2 Rating 1,269

Rating-period composition

Rating matches
6 0
Record
2–4 Previous month 2–4
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.

January 2026 No new matches Change +1 Rating 1,267

Rating-period composition

Rating matches
6 0
Record
2–4 Previous month 2–4
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.

December 2025 No new matches Change +3 Rating 1,266

Rating-period composition

Rating matches
6 0
Record
2–4 Previous month 2–4
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.

November 2025 4 new matches Change +47 Rating 1,263

Rating-period composition

Rating matches
6 +4
Record
2–4 Previous month 0–2
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
November 22, 2025 Mia Triebel
Fennec BJJ Kids Cup Gi & NoGi Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
Method Submission 01:31 6–0
Marginal influence +6
Loss
November 22, 2025 Anais S.Yagües
Fennec BJJ Kids Cup Gi & NoGi Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
Method Submission 00:39 0–0
Marginal influence -18
Loss
November 22, 2025 Anais S.Yagües
Fennec BJJ Kids Cup Gi & NoGi Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg
Method Submission 01:18 0–0
Marginal influence -11
Win
November 22, 2025 Mia Triebel
Fennec BJJ Kids Cup Gi & NoGi Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg
Method Submission 00:38 6–0
Marginal influence +12
October 2025 No new matches Change -1 Rating 1,216

Rating-period composition

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

September 2025 No new matches Change 0 Rating 1,217

Rating-period composition

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

Relevant matches
9.4
Official ranking percentile
Top 20%
Performance
18.5 pp above expectation

9.4 weighted matches against 9 different opponents across 3 events

Weighted win rate
72.7%
Expected win rate
54.2%
Average opponent rating
1,325
Repeated-opponent share
18.2%
Network connectivity
87.6%

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 2 event votes Selected outcome

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
U14 · Counts
Girls No-Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Girls Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
U14 · Counts
Girls No-Gi (under 16 y.o.) / Grey / 12-13 years / -52 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Girls Gi (under 16 y.o.) / Grey / 12-13 years / -44 kg
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Fennec BJJ Kids Cup Gi & NoGi
Does not count
Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14

Classification evidence

Why ≤ 48 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

  • ≤ 48 kg 1 competition event Selected outcome

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
≤ 48 kg · Counts as a competition event
Girls No-Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Registered weight class: -48 kg
  • Source competition limit: -48 kg

1 match in the rating period

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
≤ 48 kg · Counts as a competition event
Girls Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Registered weight class: -48 kg
  • Source competition limit: -48 kg

2 matches in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 52 kg · Does not count
Girls No-Gi (under 16 y.o.) / Grey / 12-13 years / -52 kg
  • Registered weight class: -52 kg
  • Source competition limit: -52 kg

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

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 44 kg · Does not count
Girls Gi (under 16 y.o.) / Grey / 12-13 years / -44 kg
  • Registered weight class: -44 kg
  • Source competition limit: -44 kg

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

Fennec BJJ Kids Cup Gi & NoGi
≤ 40 kg · Does not count
Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
  • Registered weight class: -40 kg
  • Source competition limit: -40 kg

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

Fennec BJJ Kids Cup Gi & NoGi
≤ 48 kg · Does not count
Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg
  • Registered weight class: -48 kg
  • Source competition limit: -48 kg

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

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 4 matches in the rating period Selected outcome
  • orange 4 matches in the rating period
  • yellow 3 matches in the rating period

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
yellow · Counts as a match
Girls Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Source belt category: yellow

2 matches in the rating period

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
yellow · Counts as a match
Girls No-Gi (under 16 y.o.) / Yellow / 12-13 years / -48 kg
  • Source belt category: yellow

1 match in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
grey · Counts as a match
Girls No-Gi (under 16 y.o.) / Grey / 12-13 years / -52 kg
  • Source belt category: grey

2 matches in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
grey · Counts as a match
Girls Gi (under 16 y.o.) / Grey / 12-13 years / -44 kg
  • Source belt category: grey

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
orange · Counts as a match
Girls No-Gi (under 16 y.o.) / Orange / 12-13 years / -40 kg
  • Source belt category: orange

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
orange · Counts as a match
Girls Gi (under 16 y.o.) / Orange / 12-13 years / -48 kg
  • Source belt category: orange

2 matches in the rating period