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CZ

Petr Chvostal

SAMURAI FIGHT CLUB

W–L
0–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,106
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
0–4
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
4
Silver
3
Bronze
3
Total medals
10
Events with results
5

Full career record

Wins
8
Losses
16
Matches
24
Win rate
33.3%

Ways of winning

Submission
0
Points
8
Decision
0
Disqualification
0

Personal records

Longest winning streak
3
Largest recorded points win
1–0

Recent recorded placements

  4. SAMURAI CUP 2024 - CFS 8

    CZ Event record 3–2

    • Grappling Gi / Mladší žáci U10 6-9 let / -25 kg
    • Fighting / Mladší žáci U10 6-9 let / -25 kg
    • Gold

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
4
Distinct events
1

Ways of winning

  • Submission 0
  • Points 0
  • Decision 0
  • Other recorded result 0

Gi versus No-Gi

Gi

Rating
1106
Record
0–4
Win rate
0%
Submission share
-

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
1,106
Change over 90 days
-75
Highest rating in 12 months
1,257
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,416
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
0%
Effective evidence
2.8
Confidence
48/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 6–11 6–11 across 17 rematches against 4 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

No win over a currently ranked opponent in this period.

Full career

  1. #349 Josef Vrága · INTERNATIONAL CZECH CHAMPIONSHIP ČSAKJ 2025 - CFS 10 Pts 0–0 Earlier · Pts 0–0 October 12, 2024 · SAMURAI CUP 2024 - CFS 8
  2. #2672 Jakub Poláček · INTERNATIONAL CZECH CHAMPIONSHIP ČSAKJ 2025 - CFS 10 Pts 1–0 Earlier · Pts 1–0 March 30, 2025 · INTERNATIONAL CZECH CHAMPIONSHIP ČSAKJ 2025 - CFS 10

Rivals

Opponent Head-to-head record Matches
Josef Vrága 3–5 8
Petr Krejčík 1–4 5
Jakub Poláček 2–0 2

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 1,106

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

July 2026 No new matches Change 0 Rating 1,106

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

June 2026 No new matches Change 0 Rating 1,106

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

May 2026 No new matches Change -1 Rating 1,106

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

April 2026 No new matches Change +3 Rating 1,107

Rating-period composition

Rating matches
4 0
Record
0–4 Previous month 0–4
Opponents
4 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.

March 2026 No new matches · 8 left period Change -106 Rating 1,104

Rating-period composition

Rating matches
4 -8
Record
0–4 Previous month 4–8
Opponents
4 -4
Events
1 -1

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

February 2026 No new matches Change +10 Rating 1,210

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
Opponents
8 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 -3 Rating 1,200

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
Opponents
8 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 +1 Rating 1,203

Rating-period composition

Rating matches
12 0
Record
4–8 Previous month 4–8
Opponents
8 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 · 2 left period Change +20 Rating 1,202

Rating-period composition

Rating matches
12 -2
Record
4–8 Previous month 4–10
Opponents
8 -1
Events
2 -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.

October 2025 4 new matches · 5 left period Change -75 Rating 1,182

Rating-period composition

Rating matches
14 -1
Record
4–10 Previous month 7–8
Opponents
9 +2
Events
3 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.
Loss
October 18, 2025 Petr Krejčík
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -30 kg
Method Points 02:00 0–4
Marginal influence -29
Loss
October 18, 2025 Jan Rác
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -30 kg
Method Points 02:00 0–24
Marginal influence -6
Loss
October 18, 2025 Barbora Hypšová
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Fighting / U12 Děti chlapci / -30 kg
Method Points 0–0
Marginal influence -28
Loss
October 18, 2025 David Kovács
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Fighting / U12 Děti chlapci / -30 kg
Method Points 0–0
Marginal influence -17
September 2025 No new matches Change 0 Rating 1,257

Rating-period composition

Rating matches
15 0
Record
7–8 Previous month 7–8
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.

Relevant matches
2.8
Official ranking percentile
-
Performance
-

2.8 weighted matches against 4 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,416
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 1 event vote Selected outcome

Registrations and outcomes

CZECH FIGHTING SERIES 11, Samurai Cup 2025
U12 · Counts
Grappling Gi / U12 Děti chlapci / -30 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12
Rumble - stužkovaná / DRAGONS 7-8 let / -140 cm
  • Competition age 9
Fighting / U12 Děti chlapci / -30 kg
  • Competition age 9
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 30 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

  • ≤ 30 kg 1 competition event Selected outcome

Registrations and outcomes

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 30 kg · Counts as a competition event
Grappling Gi / U12 Děti chlapci / -30 kg
  • Registered weight class: -30 kg
  • Source competition limit: -30 kg

2 matches in the rating period

CZECH FIGHTING SERIES 11, Samurai Cup 2025
Does not count
Rumble - stužkovaná / DRAGONS 7-8 let / -140 cm

No matches in the rating period · no valid weight evidence

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 30 kg · Counts as a competition event
Fighting / U12 Děti chlapci / -30 kg
  • Registered weight class: -30 kg
  • Source competition limit: -30 kg

2 matches in the rating period