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David Řezníček

Samba Jiu Jitsu

W–L
8–11
Won and lost rating-eligible matches in the past 12 months.
Gi
1,274
Rating based on Gi matches in the past 12 months.
No-Gi
1,293
Rating based on No-Gi matches in the past 12 months.
Current form
4–6
Results from the ten most recent rating-eligible matches.
Opponents
12
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

28
Indexed competition matches
Date Opponent Result Event Division
2026-06-20 Alexander Polák
Loss
Open Czech championship submission only 2026 Gi · GI Litle Kids Boy 7-9 years / -32kg / Grey belt
2026-06-20 Vojtěch Šatava
Loss
Open Czech championship submission only 2026 Gi · GI Litle Kids Boy 7-9 years / -32kg / Grey belt
2026-06-20 Michal Šabata
Win
Open Czech championship submission only 2026 No-Gi · NOGI Litle Kids Boy 7-9 years / -32kg
2026-06-20 Alexander Polák
Loss
Open Czech championship submission only 2026 No-Gi · NOGI Litle Kids Boy 7-9 years / -32kg
2026-06-20 Vojtěch Šatava
Loss
Open Czech championship submission only 2026 No-Gi · NOGI Litle Kids Boy 7-9 years / -32kg
2026-03-22 Antonin Tůma
Win
N-GEN Kids BJJ Tournament #4 Gi · Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
2026-03-22 Darek Pobuda
Loss
N-GEN Kids BJJ Tournament #4 Gi · Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
2026-03-22 Antonin Tůma
Win
N-GEN Kids BJJ Tournament #4 No-Gi · Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
2026-03-22 Darek Pobuda
Loss
N-GEN Kids BJJ Tournament #4 No-Gi · Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
2026-03-22 Tobiáš Jendrisek
Win
N-GEN Kids BJJ Tournament #4 No-Gi · Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
2025-11-23 Edita Tichá
Win
ADCC Czech National Championship 2025 No-Gi · Boys Junior / 7-8 years / Intermediate / -28 kg
2025-11-23 Darek Pobuda
Loss
ADCC Czech National Championship 2025 No-Gi · Boys Junior / 7-8 years / Intermediate / -28 kg
2025-09-20 Jáchym Karhánek
Loss
TATAMY 16 KIDS (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Michal Hrnčár
Win
TATAMY 16 KIDS (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Lukáš Skoumal
Win
TATAMY 16 KIDS (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Jakub Onger
Loss
TATAMY 16 KIDS (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Michal Hrnčár
Win
TATAMY 16 KIDS (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Jáchym Karhánek
Loss
TATAMY 16 KIDS (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Vojtěch Jána
Loss
TATAMY 16 KIDS (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
2025-09-20 Ivan Avramenko
Loss
TATAMY 16 KIDS (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
2024-12-07 Viktor Golda
Loss
TATAMY 12 (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Davyd Hyshpil
Loss
TATAMY 12 (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Davyd Khachatrian
Loss
TATAMY 12 (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Jáchym Karhánek
Loss
TATAMY 12 (No-GI and GI round robin) No-Gi · Kids / No Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Jáchym Karhánek
Loss
TATAMY 12 (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Daniel Cetkovsky
Loss
TATAMY 12 (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Alexey Sychov
Win
TATAMY 12 (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -24 kg
2024-12-07 Davyd Khachatrian
Loss
TATAMY 12 (No-GI and GI round robin) Gi · Kids / Gi / 7-9 years / Mix / All levels / -24 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 1,348

Rating-period composition

Rating matches
19 0
Record
8–11 Previous month 8–11
Opponents
12 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.

July 2026 No new matches Change 0 Rating 1,348

Rating-period composition

Rating matches
19 0
Record
8–11 Previous month 8–11
Opponents
12 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.

June 2026 5 new matches Change -19 Rating 1,348

Rating-period composition

Rating matches
19 +5
Record
8–11 Previous month 7–7
Opponents
12 +3
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
June 20, 2026 Alexander Polák
Open Czech championship submission only 2026 GI Litle Kids Boy 7-9 years / -32kg / Grey belt
Method Decision 03:10 0–0
Marginal influence -10
Loss
June 20, 2026 Vojtěch Šatava
Open Czech championship submission only 2026 GI Litle Kids Boy 7-9 years / -32kg / Grey belt
Method Decision 03:44 0–0
Marginal influence -6
Win
June 20, 2026 Michal Šabata
Open Czech championship submission only 2026 NOGI Litle Kids Boy 7-9 years / -32kg
Method Decision 03:04 0–0
Marginal influence +10
Loss
June 20, 2026 Alexander Polák
Open Czech championship submission only 2026 NOGI Litle Kids Boy 7-9 years / -32kg
Method Submission 02:40 0–0
Marginal influence -11
Loss
June 20, 2026 Vojtěch Šatava
Open Czech championship submission only 2026 NOGI Litle Kids Boy 7-9 years / -32kg
Method Submission 01:57 0–0
Marginal influence -9
May 2026 No new matches Change -1 Rating 1,367

Rating-period composition

Rating matches
14 0
Record
7–7 Previous month 7–7
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.

April 2026 No new matches Change +5 Rating 1,368

Rating-period composition

Rating matches
14 0
Record
7–7 Previous month 7–7
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.

March 2026 5 new matches Change +56 Rating 1,363

Rating-period composition

Rating matches
14 +5
Record
7–7 Previous month 4–5
Opponents
9 +2
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
March 22, 2026 Antonin Tůma
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
Method Submission 00:39 0–0
Marginal influence +10
Loss
March 22, 2026 Darek Pobuda
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
Method Points 03:00 0–2
Marginal influence -4
Win
March 22, 2026 Antonin Tůma
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
Method Submission 00:20 0–0
Marginal influence +9
Loss
March 22, 2026 Darek Pobuda
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
Method Submission 01:12 0–5
Marginal influence -4
Win
March 22, 2026 Tobiáš Jendrisek
N-GEN Kids BJJ Tournament #4 Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
Method Submission 01:23 0–0
Marginal influence +13
February 2026 No new matches Change +1 Rating 1,307

Rating-period composition

Rating matches
9 0
Record
4–5 Previous month 4–5
Opponents
7 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 -2 Rating 1,306

Rating-period composition

Rating matches
9 0
Record
4–5 Previous month 4–5
Opponents
7 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 · 7 left period Change +41 Rating 1,308

Rating-period composition

Rating matches
9 -7
Record
4–5 Previous month 4–12
Opponents
7 -4
Events
2 -1

7 older matches left the 12-month period: 0 won and 7 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

November 2025 2 new matches Change +5 Rating 1,267

Rating-period composition

Rating matches
16 +2
Record
4–12 Previous month 3–11
Opponents
11 +2
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
November 23, 2025 Edita Tichá
ADCC Czech National Championship 2025 Boys Junior / 7-8 years / Intermediate / -28 kg
Method Submission 02:47 0–0
Marginal influence +11
Loss
November 23, 2025 Darek Pobuda
ADCC Czech National Championship 2025 Boys Junior / 7-8 years / Intermediate / -28 kg
Method Submission 01:06 0–0
Marginal influence -5
October 2025 No new matches Change +1 Rating 1,262

Rating-period composition

Rating matches
14 0
Record
3–11 Previous month 3–11
Opponents
9 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.

September 2025 7 new matches Change +65 Rating 1,261

Rating-period composition

Rating matches
14 +7
Record
3–11 Previous month 0–7
Opponents
9 +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
September 20, 2025 Unknown opponent
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:24 0–0
Marginal influence -6
Win
September 20, 2025 Michal Hrnčár
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 01:03 0–0
Marginal influence +10
Win
September 20, 2025 Lukáš Skoumal
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 01:26 0–0
Marginal influence +11
Win
September 20, 2025 Michal Hrnčár
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Points 03:00 3–0
Marginal influence +13
Loss
September 20, 2025 Unknown opponent
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:24 0–0
Marginal influence -12
Loss
September 20, 2025 Vojtěch Jána
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:34 0–0
Marginal influence -8
Loss
September 20, 2025 Ivan Avramenko
TATAMY 16 KIDS (No-GI and GI round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:35 0–0
Marginal influence -10
Relevant matches
14.2
Official ranking percentile
Top 44%
Performance
0.8 pp below expectation

14.2 weighted matches against 12 different opponents across 4 events

Weighted win rate
43.7%
Expected win rate
44.5%
Average opponent rating
1,421
Repeated-opponent share
36.8%
Network connectivity
80.9%

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 2 event votes Selected outcome

Registrations and outcomes

Open Czech championship submission only 2026
U10 · Counts
NOGI Litle Kids Boy 7-9 years / -32kg
  • Competition age 9
GI Litle Kids Boy 7-9 years / -32kg / Grey belt
  • Competition age 9
N-GEN Kids BJJ Tournament #4
U10 · Counts
Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
  • Competition age 9
Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
  • Competition age 9
ADCC Czech National Championship 2025
Does not count
Boys Junior / 7-8 years / Intermediate / -28 kg
  • Competition age 8
TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 7-9 years / Mix / All levels / -28 kg
  • Competition age 8
Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
  • Competition age 8

Classification evidence

Why ≤ 28 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

  • ≤ 28 kg 1 competition event Selected outcome
  • ≤ 29 kg 1 competition event
  • ≤ 32 kg 1 competition event

Registrations and outcomes

Open Czech championship submission only 2026
≤ 32 kg · Counts as a competition event
NOGI Litle Kids Boy 7-9 years / -32kg
  • Registered weight class: -32kg
  • Source competition limit: -32kg

3 matches in the rating period

Open Czech championship submission only 2026
≤ 32 kg · Counts as a competition event
GI Litle Kids Boy 7-9 years / -32kg / Grey belt
  • Registered weight class: -32kg
  • Source competition limit: -32kg

2 matches in the rating period

N-GEN Kids BJJ Tournament #4
≤ 29 kg · Counts as a competition event
Boys No-Gi / All belt / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
  • Registered weight class: -29 kg (2017,2018,2019)
  • Source competition limit: -29 kg (2017,2018,2019)

3 matches in the rating period

N-GEN Kids BJJ Tournament #4
≤ 29 kg · Counts as a competition event
Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
  • Registered weight class: -29 kg (2017,2018,2019)
  • Source competition limit: -29 kg (2017,2018,2019)

2 matches in the rating period

ADCC Czech National Championship 2025
≤ 28 kg · Counts as a competition event
Boys Junior / 7-8 years / Intermediate / -28 kg
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

2 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
≤ 28 kg · Does not count
Kids / Gi / 7-9 years / Mix / All levels / -28 kg
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

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

TATAMY 16 KIDS (No-GI and GI round robin)
≤ 28 kg · Does not count
Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

4 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 4 matches in the rating period Selected outcome

Registrations and outcomes

Open Czech championship submission only 2026
grey · Counts as a match
GI Litle Kids Boy 7-9 years / -32kg / Grey belt
  • Source belt category: grey

2 matches in the rating period

N-GEN Kids BJJ Tournament #4
grey · Counts as a match
Boys Gi / White grey / Pee Wee (7-9 yrs) / -29 kg (2017,2018,2019)
  • Source belt category: grey

2 matches in the rating period