TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
CZ

Josef Vrága

COMBAT GYM Chrastava

W–L
15–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,436
Rating based on Gi matches in the past 12 months.
No-Gi
1,372
Rating based on No-Gi matches in the past 12 months.
Current form
8–2
Results from the ten most recent rating-eligible matches.
Opponents
12
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

8
Events
Date Event Result Format Division
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 CZ · Gi · U12 · ≤25 kg ; No-Gi · U12 · ≤25 kg 4–0 W–L: Win / Loss GiNo-Gi
  • Grappling Gi / U12 Děti chlapci / -25 kg
  • Grappling NoGi / U12 Děti chlapci / -25 kg
TATAMY 20: PRAGUE - KIDS (round robin) CZ · No-Gi · 7–9 yo · ≤28 kg 3–2 W–L: Win / Loss No-Gi
  • Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
CZECH FIGHTING SERIES 12 – Under the Lights 2026 CZ · Gi · U12 · ≤25 kg ; No-Gi · U12 · ≤25 kg 3–1 W–L: Win / Loss GiNo-Gi
  • Grappling Gi / U12 Děti chlapci / -25 kg
  • Grappling NoGi / U12 Děti chlapci / -25 kg
Pardubice Grappling Open vol.5 CZ · Gi · 9–10 yo · ≤28 kg 2–0 W–L: Win / Loss Gi
  • Boys Junior GI / 9-10 years / -28 kg / Intermediate
CZECH FIGHTING SERIES 11, Samurai Cup 2025 CZ · Gi · U12 · ≤25 kg ; No-Gi · U12 · ≤25 kg 3–1 W–L: Win / Loss GiNo-Gi
  • Grappling NoGi / U12 Děti chlapci / -25 kg
  • Grappling Gi / U12 Děti chlapci / -25 kg
INTERNATIONAL CZECH CHAMPIONSHIP ČSAKJ 2025 - CFS 10 CZ · Gi · U12 · ≤25 kg 2–1 W–L: Win / Loss Gi
  • Fighting / U12 Děti chlapci / -25 kg
SAMURAI CUP 2024 - CFS 8 CZ · Gi · U10 · ≤25 kg ; Gi · U10 · ≤25 kg 3–2 W–L: Win / Loss Gi
  • Grappling Gi / Mladší žáci U10 6-9 let / -25 kg
  • Fighting / Mladší žáci U10 6-9 let / -25 kg
International Czech Championship ČSAKJ 2024 - CFS 7 CZ · Gi · U10 · ≤25 kg 1–1 W–L: Win / Loss Gi
  • Fighting / Mladší žáci U10 6-9 let / -25 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 1,469

Rating-period composition

Rating matches
19 0
Record
15–4 Previous month 15–4
Opponents
12 0
Events
5 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 1,469

Rating-period composition

Rating matches
19 0
Record
15–4 Previous month 15–4
Opponents
12 0
Events
5 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 1,469

Rating-period composition

Rating matches
19 0
Record
15–4 Previous month 15–4
Opponents
12 0
Events
5 0

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

May 2026 No new matches Change -2 Rating 1,470

Rating-period composition

Rating matches
19 0
Record
15–4 Previous month 15–4
Opponents
12 0
Events
5 0

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

April 2026 4 new matches Change +23 Rating 1,472

Rating-period composition

Rating matches
19 +4
Record
15–4 Previous month 11–4
Opponents
12 +1
Events
5 +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
April 12, 2026 Mathias Bojko
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Submission 01:12 4–0
Marginal influence +2
Win
April 12, 2026 Mathias Bojko
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Submission 01:35 10–0
Marginal influence +2
Win
April 12, 2026 Luka Lakomý
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Submission 01:28 13–0
Marginal influence +7
Win
April 12, 2026 Luka Lakomý
CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Points 02:00 10–0
Marginal influence +7
March 2026 5 new matches · 3 left period Change +3 Rating 1,449

Rating-period composition

Rating matches
15 +2
Record
11–4 Previous month 10–3
Opponents
11 +2
Events
4 0

3 older matches left the 12-month period: 2 won and 1 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.
Win
March 21, 2026 Botond Kertész
TATAMY 20: PRAGUE - KIDS (round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Points 03:00 2–0
Marginal influence +9
Win
March 21, 2026 Jaroslav Zavadil
TATAMY 20: PRAGUE - KIDS (round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 0–0
Marginal influence +6
Win
March 21, 2026 Botond Kertész
TATAMY 20: PRAGUE - KIDS (round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 02:19 0–7
Marginal influence +9
Loss
March 21, 2026 Ivan Avramenko
TATAMY 20: PRAGUE - KIDS (round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Submission 00:26 0–0
Marginal influence -15
Loss
March 21, 2026 Michal Hrnčár
TATAMY 20: PRAGUE - KIDS (round robin) Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
Method Points 03:00 2–3
Marginal influence -20
February 2026 6 new matches Change +107 Rating 1,446

Rating-period composition

Rating matches
13 +6
Record
10–3 Previous month 5–2
Opponents
9 +5
Events
4 +2

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 28, 2026 Nataly Sarkány
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Submission 01:56 2–0
Marginal influence +8
Loss
February 28, 2026 Maxim Krmela
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Points 02:00 2–3
Marginal influence -9
Win
February 28, 2026 Constantin Pîslaru
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Submission 01:05 2–0
Marginal influence +10
Win
February 28, 2026 Maxim Krmela
CZECH FIGHTING SERIES 12 – Under the Lights 2026 Grappling Gi / U12 Děti chlapci / -25 kg
Method Decision 02:00 3–0
Marginal influence +20
Win
February 7, 2026 Jaroslav Zavadil
Pardubice Grappling Open vol.5 Boys Junior GI / 9-10 years / -28 kg / Intermediate
Method Submission 00:41 0–0
Marginal influence +12
Win
February 7, 2026 Adam Jukl
Pardubice Grappling Open vol.5 Boys Junior GI / 9-10 years / -28 kg / Intermediate
Method Submission 00:14 0–0
Marginal influence +8
January 2026 No new matches Change -1 Rating 1,339

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 5–2
Opponents
4 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 0 Rating 1,340

Rating-period composition

Rating matches
7 0
Record
5–2 Previous month 5–2
Opponents
4 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 No new matches Change +3 Rating 1,340

Rating-period composition

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

October 2025 4 new matches · 5 left period Change +81 Rating 1,337

Rating-period composition

Rating matches
7 -1
Record
5–2 Previous month 5–3
Opponents
4 +2
Events
2 0

5 older matches left the 12-month period: 3 won and 2 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.
Win
October 18, 2025 David Kalous
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -25 kg
Method Submission 02:00 14–2
Marginal influence +9
Loss
October 18, 2025 Václav Krištof
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -25 kg
Method Points 01:25 10–12
Marginal influence -15
Win
October 18, 2025 Václav Krištof
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Points 02:00 0–0
Marginal influence +8
Win
October 18, 2025 Mathias Bojko
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling NoGi / U12 Děti chlapci / -25 kg
Method Submission 00:21 0–0
Marginal influence +2
September 2025 No new matches Change 0 Rating 1,256

Rating-period composition

Rating matches
8 0
Record
5–3 Previous month 5–3
Opponents
2 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.

Relevant matches
13.2
Official ranking percentile
Top 12%
Performance
15.4 pp above expectation

13.2 weighted matches against 12 different opponents across 5 events

Weighted win rate
78.0%
Expected win rate
62.5%
Average opponent rating
1,314
Repeated-opponent share
36.8%
Network connectivity
80.9%

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 4 event votes Selected outcome

Registrations and outcomes

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026
U12 · Counts
Grappling Gi / U12 Děti chlapci / -25 kg
  • Competition age 10
  • Registered age: u12
  • Source category: u12
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Competition age 10
  • Registered age: u12
  • Source category: u12
TATAMY 20: PRAGUE - KIDS (round robin)
U12 · Counts
Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
  • Competition age 10
CZECH FIGHTING SERIES 12 – Under the Lights 2026
U12 · Counts
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Competition age 10
  • Registered age: u12
  • Source category: u12
Grappling Gi / U12 Děti chlapci / -25 kg
  • Competition age 10
  • Registered age: u12
  • Source category: u12
Pardubice Grappling Open vol.5
U12 · Counts
Boys Junior GI / 9-10 years / -28 kg / Intermediate
  • Competition age 10
CZECH FIGHTING SERIES 11, Samurai Cup 2025
Does not count
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12
Grappling Gi / U12 Děti chlapci / -25 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 25 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

  • ≤ 25 kg 2 competition events Selected outcome
  • ≤ 28 kg 1 competition event

Registrations and outcomes

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026
≤ 25 kg · Counts as a competition event
Grappling Gi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

2 matches in the rating period

CFS 13 CZECH CHAMPIONSHIP ČSAKJ 2026
≤ 25 kg · Counts as a competition event
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

2 matches in the rating period

TATAMY 20: PRAGUE - KIDS (round robin)
≤ 28 kg · Counts as a competition event
Kids / No Gi / 7-9 years / Mix / All levels / -28 kg
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

5 matches in the rating period

CZECH FIGHTING SERIES 12 – Under the Lights 2026
≤ 25 kg · Counts as a competition event
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

2 matches in the rating period

CZECH FIGHTING SERIES 12 – Under the Lights 2026
≤ 25 kg · Counts as a competition event
Grappling Gi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

2 matches in the rating period

Pardubice Grappling Open vol.5
≤ 28 kg · Does not count
Boys Junior GI / 9-10 years / -28 kg / Intermediate
  • Registered weight class: -28 kg
  • Source competition limit: -28 kg

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

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 25 kg · Does not count
Grappling NoGi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

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

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 25 kg · Does not count
Grappling Gi / U12 Děti chlapci / -25 kg
  • Registered weight class: -25 kg
  • Source competition limit: -25 kg

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