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CZ

Kryštof Jan Vondráček

Jungle BJJ Frenštát

W–L
6–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,397
Rating based on Gi matches in the past 12 months.
No-Gi
-
Rating based on No-Gi matches in the past 12 months.
Current form
6–2
Results from the ten most recent rating-eligible matches.
Opponents
8
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
4
Silver
2
Bronze
0
Total medals
6
Events with results
11

Full career record

Wins
22
Losses
13
Matches
35
Win rate
62.9%

Ways of winning

Submission
9
Points
11
Decision
0
Disqualification
1

Personal records

Longest winning streak
9
Longest submission streak
4
Longest gold streak
3
Largest recorded points win
29–0

Recent recorded placements

  1. XV. REBEL BJJ CUP

    CZ Event record 3–0

    • Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)

  5. XIV. REBEL BJJ CUP

    CZ Event record 3–0

    • Boys Gi / White grey / Pee Wee (7-9 yrs) / -32 kg (2016,2017,2018)

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
3
Unique opponents
8
Distinct events
3

Ways of winning

  • Submission 2 33%
  • Points 4 67%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1397
Record
6–2
Win rate
75%
Submission share
33%

No-Gi

Rating
-
Record
-
Win rate
-
Submission share
-

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
1,397
Change over 90 days
-20
Highest rating in 12 months
1,461
Performance versus expectation
+21.1 pp
Schedule strength
Top 29%
Average opponent rating
1,350
Weighted win rate
76%
Expected win rate
55%
Repeat-opponent share
0%
Effective evidence
6.2
Confidence
76/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 9–8 9–8 across 17 rematches against 7 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #364 Alexander Polák · XIII. GrappleXmas BJJ Cup Pts 29–0
  2. #505 Rodan Gábriš · XIII. GrappleXmas BJJ Cup Sub 02:01 0–2
  3. #890 Jakub Dominik · XV. REBEL BJJ CUP Sub 01:05 2–0
  4. #1159 Milan Kolomazník · XIII. GrappleXmas BJJ Cup Pts 3–0
  5. #3003 David Polášek · XV. REBEL BJJ CUP Pts 2–0

Full career

  1. #364 Alexander Polák · XIII. GrappleXmas BJJ Cup Pts 29–0 Earlier · Sub 0–2 March 22, 2025 · XIV. REBEL BJJ CUP
  2. #505 Rodan Gábriš · XIII. GrappleXmas BJJ Cup Sub 02:01 0–2
  3. #890 Jakub Dominik · XV. REBEL BJJ CUP Sub 01:05 2–0
  4. #1159 Milan Kolomazník · XIII. GrappleXmas BJJ Cup Pts 3–0
  5. #1288 Michal Mitlehner · N-GEN Kids BJJ Tournament #1 Pts 3–0
  6. #1623 František Strnadel · XIV. REBEL BJJ CUP Pts 25–0
  7. #1938 Dominik Schwarc · XIV. REBEL BJJ CUP Sub 00:15 5–0
  8. #2181 Vojtěch Voznica · XII. GrappleXmas BJJ Cup Pts 12–0
  9. #2566 Pavel Herot · XII. GrappleXmas BJJ Cup Sub 00:44 9–0
  10. #3003 David Polášek · XV. REBEL BJJ CUP Pts 2–0

Rivals

Opponent Head-to-head record Matches
Simon Kovac 0–4 4

Around this athlete

Athlete Rank Rating
Kryštof Jan Vondráček #850 1,397
Timur Volianyk #851 1,397

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 +1 Rating 1,397

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
8 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 1,396

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
8 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 +4 Rating 1,396

Rating-period composition

Rating matches
8 0
Record
6–2 Previous month 6–2
Opponents
8 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 No new matches · 2 left period Change -49 Rating 1,392

Rating-period composition

Rating matches
8 -2
Record
6–2 Previous month 8–2
Opponents
8 -2
Events
3 -1

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

April 2026 3 new matches Change +62 Rating 1,441

Rating-period composition

Rating matches
10 +3
Record
8–2 Previous month 5–2
Opponents
10 +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.
Win
April 18, 2026 Vojta Novák
XV. REBEL BJJ CUP Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
Method Points 03:00 13–0
Marginal influence +17
Win
April 18, 2026 Jakub Dominik
XV. REBEL BJJ CUP Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
Method Submission 01:05 2–0
Marginal influence +29
Win
April 18, 2026 David Polášek
XV. REBEL BJJ CUP Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
Method Points 03:00 2–0
Marginal influence +6
March 2026 2 new matches · 3 left period Change -102 Rating 1,379

Rating-period composition

Rating matches
7 -1
Record
5–2 Previous month 8–0
Opponents
7 0
Events
3 0

3 older matches left the 12-month period: 3 won and 0 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
March 22, 2026 Vojtěch Sochor
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
Method Submission 00:53 0–0
Marginal influence -46
Loss
March 22, 2026 Simon Kovac
N-GEN Kids BJJ Tournament #4 Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
Method Submission 00:39 0–0
Marginal influence -26
February 2026 No new matches Change +17 Rating 1,481

Rating-period composition

Rating matches
8 0
Record
8–0 Previous month 8–0
Opponents
7 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.

January 2026 No new matches Change +3 Rating 1,464

Rating-period composition

Rating matches
8 0
Record
8–0 Previous month 8–0
Opponents
7 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.

December 2025 3 new matches · 3 left period Change +50 Rating 1,461

Rating-period composition

Rating matches
8 0
Record
8–0 Previous month 7–1
Opponents
7 -1
Events
3 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
December 20, 2025 Alexander Polák
XIII. GrappleXmas BJJ Cup Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
Method Points 03:00 29–0
Marginal influence +27
Win
December 20, 2025 Milan Kolomazník
XIII. GrappleXmas BJJ Cup Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
Method Points 03:00 3–0
Marginal influence +24
Win
December 20, 2025 Rodan Gábriš
XIII. GrappleXmas BJJ Cup Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
Method Submission 02:01 0–2
Marginal influence +32
November 2025 No new matches · 4 left period Change -22 Rating 1,411

Rating-period composition

Rating matches
8 -4
Record
7–1 Previous month 9–3
Opponents
8 -4
Events
3 -1

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

October 2025 No new matches Change -4 Rating 1,433

Rating-period composition

Rating matches
12 0
Record
9–3 Previous month 9–3
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.

September 2025 No new matches Change +3 Rating 1,437

Rating-period composition

Rating matches
12 0
Record
9–3 Previous month 9–3
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.

Relevant matches
6.2
Official ranking percentile
Top 28%
Performance
21.1 pp above expectation

6.2 weighted matches against 8 different opponents across 3 events

Weighted win rate
75.7%
Expected win rate
54.6%
Average opponent rating
1,350
Repeated-opponent share
0.0%
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 2 event votes Selected outcome

Registrations and outcomes

XV. REBEL BJJ CUP
U12 · Counts
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Competition age 10
  • Registered age: u12
  • Source category: u12
N-GEN Kids BJJ Tournament #4
U12 · Counts
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Competition age 10
  • Registered age: u12
  • Source category: u12
XIII. GrappleXmas BJJ Cup
Does not count
Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
  • Competition age 9

Classification evidence

Why ≤ 35 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

  • ≤ 35 kg 1 competition event Selected outcome
  • ≤ 39 kg 2 competition events

Registrations and outcomes

XV. REBEL BJJ CUP
≤ 39 kg · Counts as a competition event
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Registered weight class: -39 kg (2015,2016)
  • Source competition limit: -39 kg (2015,2016)

3 matches in the rating period

N-GEN Kids BJJ Tournament #4
≤ 39 kg · Counts as a competition event
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Registered weight class: -39 kg (2015,2016)
  • Source competition limit: -39 kg (2015,2016)

2 matches in the rating period

XIII. GrappleXmas BJJ Cup
≤ 35 kg · Counts as a competition event
Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
  • Registered weight class: -35 kg (2016,2017,2018)
  • Source competition limit: -35 kg (2016,2017,2018)

3 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 8 matches in the rating period Selected outcome

Registrations and outcomes

XV. REBEL BJJ CUP
grey · Counts as a match
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Source belt category: grey

3 matches in the rating period

N-GEN Kids BJJ Tournament #4
grey · Counts as a match
Boys Gi / White grey / Junior (10-11yrs) / -39 kg (2015,2016)
  • Source belt category: grey

2 matches in the rating period

XIII. GrappleXmas BJJ Cup
grey · Counts as a match
Boys Gi / White grey / Pee Wee (7-9 yrs) / -35 kg (2016,2017,2018)
  • Source belt category: grey

3 matches in the rating period