TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
DE

Gustav Gruß

Fennec Jiu Jitsu

W–L
4–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,314
Rating based on Gi matches in the past 12 months.
No-Gi
1,162
Rating based on No-Gi matches in the past 12 months.
Current form
4–4
Results from the ten most recent rating-eligible matches.
Opponents
5
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
6
Silver
7
Bronze
4
Total medals
17
Events with results
13

Full career record

Wins
26
Losses
21
Matches
47
Win rate
55.3%

Ways of winning

Submission
16
Points
5
Decision
2
Disqualification
0

Personal records

Longest winning streak
8
Longest submission streak
4
Longest gold streak
3
Largest recorded points win
8–2

Recent recorded placements

  3. Fennec BJJ Kids Cup Gi & NoGi

    DE Event record 3–1

    • Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
    • Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg

  4. Fennec BJJ Kids Cup Vol. 6

    DE Event record 2–3

    • Boys Gi / Junior I (9/10yrs) / Yellow/Orange / -36,00 kg
    • Boys NoGi / Junior I (9/10yrs) / Yellow/Orange / -36,00 kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
1
Unique opponents
5
Distinct events
3

Ways of winning

  • Submission 2 50%
  • Points 2 50%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1314
Record
3–1
Win rate
75%
Submission share
33%

No-Gi

Rating
1162
Record
1–3
Win rate
25%
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
1,314
Change over 90 days
-22
Highest rating in 12 months
1,348
Performance versus expectation
-1.5 pp
Schedule strength
Top 46%
Average opponent rating
1,330
Weighted win rate
47%
Expected win rate
49%
Repeat-opponent share
38%
Effective evidence
7.4
Confidence
82/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 19–16 19–16 across 35 rematches against 12 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #371 Martin Silin · Fennec BJJ Kids Cup Gi & NoGi Pts 5–0
  2. #1263 Alexis Alfano · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Pts 2–0

Full career

  1. #237 Béla Steinkretzer · Fennec BJJ Kids Cup Vol.5 Sub 01:03 0–0 Earlier · Sub 00:17 0–0 March 23, 2024 · Fennec BJJ Kids Cup Vol.5
  2. #371 Martin Silin · Fennec BJJ Kids Cup Gi & NoGi Pts 5–0
  3. #506 Max Lentfer · Fennec BJJ Kids Cup Vol.5 Sub 01:56 0–2 Earlier · Sub 01:42 0–0 March 23, 2024 · Fennec BJJ Kids Cup Vol.5
  4. #1263 Alexis Alfano · Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Pts 2–0

Rivals

Opponent Head-to-head record Matches
Max Lentfer 4–1 5
Nik Molchanov 2–3 5
Raphael Müller 4–0 4

Around this athlete

Athlete Rank Rating
Mayson Bonte #831 1,314
Gustav Gruß #832 1,314
Frederik Heyder #833 1,314

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 -4 Rating 1,314

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
5 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 1,318

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
5 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 1,318

Rating-period composition

Rating matches
8 0
Record
4–4 Previous month 4–4
Opponents
5 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 2 new matches Change -29 Rating 1,319

Rating-period composition

Rating matches
8 +2
Record
4–4 Previous month 4–2
Opponents
5 +1
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.
Loss
May 23, 2026 Fynn Quilitz
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -50 kg
Method Points 04:00 2–10
Marginal influence -27
Loss
May 23, 2026 Fynn Quilitz
BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP Boys Gi (under 16 y.o.) / Yellow / Orange / 12-13 years / -55 kg
Method Points 04:00 0–2
Marginal influence -9
April 2026 2 new matches Change +4 Rating 1,348

Rating-period composition

Rating matches
6 +2
Record
4–2 Previous month 3–1
Opponents
4 +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.
Loss
April 11, 2026 Béla Steinkretzer
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys No-Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
Method Points 04:00 0–9
Marginal influence -20
Win
April 11, 2026 Alexis Alfano
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
Method Points 04:00 2–0
Marginal influence +22
March 2026 No new matches Change +1 Rating 1,344

Rating-period composition

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

February 2026 No new matches Change -1 Rating 1,343

Rating-period composition

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

January 2026 No new matches Change 0 Rating 1,344

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
2 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 +3 Rating 1,344

Rating-period composition

Rating matches
4 0
Record
3–1 Previous month 3–1
Opponents
2 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 4 new matches · 5 left period Change +51 Rating 1,341

Rating-period composition

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

5 older matches left the 12-month period: 2 won and 3 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
November 22, 2025 Martin Silin
Fennec BJJ Kids Cup Gi & NoGi Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
Method Submission 02:55 7–2
Marginal influence -25
Win
November 22, 2025 Thore Hoffmann
Fennec BJJ Kids Cup Gi & NoGi Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
Method Submission 00:11 0–0
Marginal influence +8
Win
November 22, 2025 Martin Silin
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
Method Points 03:00 5–0
Marginal influence +30
Win
November 22, 2025 Thore Hoffmann
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
Method Submission 00:18 0–0
Marginal influence +21
October 2025 No new matches Change -1 Rating 1,290

Rating-period composition

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

September 2025 No new matches Change 0 Rating 1,291

Rating-period composition

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

Relevant matches
7.4
Official ranking percentile
Top 56%
Performance
1.5 pp below expectation

7.4 weighted matches against 5 different opponents across 3 events

Weighted win rate
47.1%
Expected win rate
48.7%
Average opponent rating
1,330
Repeated-opponent share
37.5%
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
Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -50 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Boys Gi (under 16 y.o.) / Yellow / Orange / 12-13 years / -55 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
U14 · Counts
Boys No-Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Boys Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Competition age 12
  • Registered age: u14
  • Source category: u14
Fennec BJJ Kids Cup Gi & NoGi
Does not count
Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12
Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 42 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

  • ≤ 42 kg 1 competition event Selected outcome
  • ≤ 45 kg 1 competition event

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
≤ 50 kg · Does not count
Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -50 kg
  • Registered weight class: -50 kg
  • Source competition limit: -50 kg

1 match in the rating period · conflicting upper weight limits make this event ambiguous

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
≤ 55 kg · Does not count
Boys Gi (under 16 y.o.) / Yellow / Orange / 12-13 years / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

1 match in the rating period · conflicting upper weight limits make this event ambiguous

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 45 kg · Counts as a competition event
Boys No-Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Registered weight class: -45 kg
  • Source competition limit: -45 kg

1 match in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 45 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Registered weight class: -45 kg
  • Source competition limit: -45 kg

1 match in the rating period

Fennec BJJ Kids Cup Gi & NoGi
≤ 42 kg · Counts as a competition event
Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Registered weight class: -42 kg
  • Source competition limit: -42 kg

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
≤ 42 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Registered weight class: -42 kg
  • Source competition limit: -42 kg

2 matches in the rating period

Classification evidence

Why Yellow?

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

  • yellow 7 matches in the rating period Selected outcome
  • orange 1 match in the rating period

Registrations and outcomes

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
orange · Counts as a match
Boys No-Gi (under 16 y.o.) / Orange / 12-13 years / -50 kg
  • Source belt category: orange

1 match in the rating period

BERLIN OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
yellow · Counts as a match
Boys Gi (under 16 y.o.) / Yellow / Orange / 12-13 years / -55 kg
  • Source belt category: yellow

1 match in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
yellow · Counts as a match
Boys No-Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Source belt category: yellow

1 match in the rating period

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
yellow · Counts as a match
Boys Gi (under 16 y.o.) / Yellow / 12-13 years / -45 kg
  • Source belt category: yellow

1 match in the rating period

Fennec BJJ Kids Cup Gi & NoGi
yellow · Counts as a match
Boys No-Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Source belt category: yellow

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
yellow · Counts as a match
Boys Gi (under 16 y.o.) / Yellow / 10-11 years / -42 kg
  • Source belt category: yellow

2 matches in the rating period