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David Schadko

Renzo Gracie Villingen

W–L
2–5
Won and lost rating-eligible matches in the past 12 months.
Gi
1,101
Rating based on Gi matches in the past 12 months.
No-Gi
1,222
Rating based on No-Gi matches in the past 12 months.
Current form
2–6
Results from the ten most recent rating-eligible matches.
Opponents
4
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
1
Silver
3
Bronze
0
Total medals
4
Events with results
4

Full career record

Wins
2
Losses
8
Matches
10
Win rate
20.0%

Ways of winning

Submission
2
Points
0
Decision
0
Disqualification
0

Personal records

Longest winning streak
1
Longest submission streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
4
Distinct events
3

Ways of winning

  • Submission 2 100%
  • Points 0 0%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1101
Record
0–3
Win rate
0%
Submission share
-

No-Gi

Rating
1222
Record
2–2
Win rate
50%
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
1,246
Change over 90 days
+116
Highest rating in 12 months
1,240
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,262
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
43%
Effective evidence
4.6
Confidence
69/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–6 2–6 across 8 rematches against 4 repeat opponents.

Rivals

Opponent Head-to-head record Matches
Diego Kamuf 2–0 2
Eyüp Er 0–2 2

Around this athlete

Athlete Rank Rating
Noa Rajkovic #1126 1,247
David Schadko #1127 1,246
Klaas Buwalda #1128 1,246

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 0 Rating 1,246

Rating-period composition

Rating matches
7 0
Record
2–5 Previous month 2–5
Opponents
4 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 1,246

Rating-period composition

Rating matches
7 0
Record
2–5 Previous month 2–5
Opponents
4 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 · 2 left period Change +9 Rating 1,246

Rating-period composition

Rating matches
7 -2
Record
2–5 Previous month 2–7
Opponents
4 -1
Events
3 -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.

May 2026 No new matches Change 0 Rating 1,237

Rating-period composition

Rating matches
9 0
Record
2–7 Previous month 2–7
Opponents
5 0
Events
4 0

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

April 2026 No new matches Change -1 Rating 1,237

Rating-period composition

Rating matches
9 0
Record
2–7 Previous month 2–7
Opponents
5 0
Events
4 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 -1 Rating 1,238

Rating-period composition

Rating matches
9 0
Record
2–7 Previous month 2–7
Opponents
5 0
Events
4 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 1,239

Rating-period composition

Rating matches
9 0
Record
2–7 Previous month 2–7
Opponents
5 0
Events
4 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 1,240

Rating-period composition

Rating matches
9 0
Record
2–7 Previous month 2–7
Opponents
5 0
Events
4 0

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

December 2025 4 new matches Change +58 Rating 1,240

Rating-period composition

Rating matches
9 +4
Record
2–7 Previous month 0–5
Opponents
5 +2
Events
4 +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
December 13, 2025 Leo Güttler
Grappling Battle Heidelberg Boys Gi / Grey / Junior I (10yrs) / -33,40 kg
Method Points 03:00 2–6
Marginal influence -18
Loss
December 13, 2025 Leo Güttler
Grappling Battle Heidelberg Boys Gi / Grey / Junior I (10yrs) / -33,40 kg
Method Points 03:00 0–6
Marginal influence -18
Win
December 13, 2025 Diego Kamuf
Grappling Battle Heidelberg Boys No-Gi / White / Pee Wee II (8yrs) / -31,80 kg
Method Submission 00:27 0–0
Marginal influence +21
Win
December 13, 2025 Diego Kamuf
Grappling Battle Heidelberg Boys No-Gi / White / Pee Wee II (8yrs) / -31,80 kg
Method Submission 00:44 1–0
Marginal influence +21
November 2025 1 new match Change +81 Rating 1,182

Rating-period composition

Rating matches
5 +1
Record
0–5 Previous month 0–4
Opponents
3 +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
November 23, 2025 Jonas KABENGELE
International German Open 2025 - Kinder und Jugendliche U10 - male / female - Gi / U10 - Alter 7 Jahre bis 9 Jahre / -34 kg
Method Submission 02:57 0–9
Marginal influence -29
October 2025 2 new matches Change -23 Rating 1,101

Rating-period composition

Rating matches
4 +2
Record
0–4 Previous month 0–2
Opponents
2 +1
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
October 4, 2025 Eyüp Er
Bulldog BJJ Inhouse Tournament Kids Mixed No-Gi / Beginner / -35 kg
Method Submission 02:20 2–2
Marginal influence -5
Loss
October 4, 2025 Eyüp Er
Bulldog BJJ Inhouse Tournament Kids Mixed No-Gi / Beginner / -35 kg
Method Submission 01:14 0–2
Marginal influence -5
September 2025 No new matches Change 0 Rating 1,124

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
4.6
Official ranking percentile
Top 76%
Performance
-

4.6 weighted matches against 4 different opponents across 3 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,262
Repeated-opponent share
42.9%
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 1 event vote Selected outcome

Registrations and outcomes

Grappling Battle Heidelberg
U12 · Counts
Boys Gi / Grey / Junior I (10yrs) / -33,40 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12
Boys No-Gi / White / Pee Wee II (8yrs) / -31,80 kg
  • Competition age 9
  • Registered age: u10
  • Source category: u10
International German Open 2025 - Kinder und Jugendliche
Does not count
Freundschaftskämpfe / Freundschaftskampf 9
  • Competition age 9
  • Registered age: u12
  • Source category: u12
U10 - male / female - Gi / U10 - Alter 7 Jahre bis 9 Jahre / -34 kg
  • Competition age 9
  • Registered age: u8
  • Source category: u8
U10 - male / female - NoGi / U10 - Alter 7 Jahre bis 9 Jahre / -35 kg
  • Competition age 9
  • Registered age: u8
  • Source category: u8
Bulldog BJJ Inhouse Tournament
Does not count
Kids Mixed No-Gi / Beginner / -35 kg
  • Competition age 9
  • 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
  • ≤ 35 kg 1 competition event

Registrations and outcomes

Grappling Battle Heidelberg
≤ 33 kg · Does not count
Boys Gi / Grey / Junior I (10yrs) / -33,40 kg
  • Registered weight class: -33,40 kg
  • Source competition limit: -33,40 kg

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

Grappling Battle Heidelberg
≤ 32 kg · Does not count
Boys No-Gi / White / Pee Wee II (8yrs) / -31,80 kg
  • Registered weight class: -31,80 kg
  • Source competition limit: -31,80 kg

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

International German Open 2025 - Kinder und Jugendliche
Does not count
Freundschaftskämpfe / Freundschaftskampf 9

1 match in the rating period · weight class could not be normalized reliably

International German Open 2025 - Kinder und Jugendliche
≤ 34 kg · Counts as a competition event
U10 - male / female - Gi / U10 - Alter 7 Jahre bis 9 Jahre / -34 kg
  • Registered weight class: -34 kg
  • Source competition limit: -34 kg

1 match in the rating period

International German Open 2025 - Kinder und Jugendliche
Does not count
U10 - male / female - NoGi / U10 - Alter 7 Jahre bis 9 Jahre / -35 kg
  • Registered weight class: -35 kg
  • Source competition limit: -35 kg

No matches in the rating period · no valid weight evidence

Bulldog BJJ Inhouse Tournament
≤ 35 kg · Counts as a competition event
Kids Mixed No-Gi / Beginner / -35 kg
  • Registered weight class: -35 kg
  • Source competition limit: -35 kg

2 matches in the rating period

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 2 matches in the rating period Selected outcome
  • white 2 matches in the rating period

Registrations and outcomes

Grappling Battle Heidelberg
grey · Counts as a match
Boys Gi / Grey / Junior I (10yrs) / -33,40 kg
  • Source belt category: grey

2 matches in the rating period

Grappling Battle Heidelberg
white · Counts as a match
Boys No-Gi / White / Pee Wee II (8yrs) / -31,80 kg
  • Source belt category: white

2 matches in the rating period