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CZ

Roman Marčenko

Tiger gym

W–L
5–8
Won and lost rating-eligible matches in the past 12 months.
Gi
1,281
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
4–6
Results from the ten most recent rating-eligible matches.
Opponents
11
Unique opponents faced in rating-eligible matches in the past 12 months.

Tournament history

Events

7
Events
Date Event Result Format Division
TATAMY 17 KIDS (No-GI and GI round robin) CZ · Gi · 10–12 yo · white/grey · ≤36 kg 2–3 W–L: Win / Loss Gi
  • Place #4
CZECH FIGHTING SERIES 11, Samurai Cup 2025 CZ · Gi · U12 · ≤35 kg 2–1 W–L: Win / Loss Gi
  • Grappling Gi / U12 Děti chlapci / -35 kg
TATAMY 16 KIDS (No-GI and GI round robin) CZ · Gi · 10–12 yo · white/grey · ≤32 kg 1–4 W–L: Win / Loss Gi
  • Place #4
2025 AGF Prague Jiu Jitsu Championships CZ · Gi · 10–11 yo · white · ≤34 kg 2–0 W–L: Win / Loss Gi
  • Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Pardubice Grappling Open vol.3 CZ · Gi · 9–10 yo · ≤32 kg 0–2 W–L: Win / Loss Gi Boys Junior GI / 9-10 years / -32 kg / Beginner
2024 Prague Open CZ · Gi · 12–13 yo · grey · ≤34 kg 0–2 W–L: Win / Loss Gi
  • Gi Kids / Mixed / Juniors (12 - 13 yrs) / Gray / Feather II (Up to 34.00 kg)
TATAMY 11 (No-GI and GI round robin) CZ · Gi · 10–12 yo · white/grey · ≤32 kg 0–2 W–L: Win / Loss Gi
  • Kids / Gi / 10-12 years / Boys / White/grey belt / -32 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 +1 Rating 1,281

Rating-period composition

Rating matches
13 0
Record
5–8 Previous month 5–8
Opponents
11 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 1,280

Rating-period composition

Rating matches
13 0
Record
5–8 Previous month 5–8
Opponents
11 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 -2 Rating 1,280

Rating-period composition

Rating matches
13 0
Record
5–8 Previous month 5–8
Opponents
11 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 Change -3 Rating 1,282

Rating-period composition

Rating matches
13 0
Record
5–8 Previous month 5–8
Opponents
11 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 -4 Rating 1,285

Rating-period composition

Rating matches
13 0
Record
5–8 Previous month 5–8
Opponents
11 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 No new matches · 2 left period Change -59 Rating 1,289

Rating-period composition

Rating matches
13 -2
Record
5–8 Previous month 7–8
Opponents
11 -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.

February 2026 No new matches Change -2 Rating 1,348

Rating-period composition

Rating matches
15 0
Record
7–8 Previous month 7–8
Opponents
13 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 +7 Rating 1,350

Rating-period composition

Rating matches
15 0
Record
7–8 Previous month 7–8
Opponents
13 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 No new matches Change -3 Rating 1,343

Rating-period composition

Rating matches
15 0
Record
7–8 Previous month 7–8
Opponents
13 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.

November 2025 5 new matches · 2 left period Change +42 Rating 1,346

Rating-period composition

Rating matches
15 +3
Record
7–8 Previous month 5–7
Opponents
13 +2
Events
4 0

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.

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 1, 2025 David Voloshchuk
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Disqualification 00:10 0–0
Marginal influence -15
Loss
November 1, 2025 Erik Macháček
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 01:01 0–0
Marginal influence -11
Loss
November 1, 2025 Kiril Delos Santos
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 01:28 0–0
Marginal influence -5
Win
November 1, 2025 David Polášek
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 00:10 0–0
Marginal influence +9
Win
November 1, 2025 David Chromčák
TATAMY 17 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
Method Submission 00:46 0–0
Marginal influence +23
October 2025 3 new matches Change +41 Rating 1,304

Rating-period composition

Rating matches
12 +3
Record
5–7 Previous month 3–6
Opponents
11 +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
October 18, 2025 Leoš Chovanec
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -35 kg
Method Submission 01:35 4–6
Marginal influence +20
Win
October 18, 2025 Arne Schegolev
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -35 kg
Method Submission 00:26 2–0
Marginal influence +17
Loss
October 18, 2025 Kiril Delos Santos
CZECH FIGHTING SERIES 11, Samurai Cup 2025 Grappling Gi / U12 Děti chlapci / -35 kg
Method Submission 02:00 6–14
Marginal influence -7
September 2025 5 new matches · 2 left period Change +50 Rating 1,263

Rating-period composition

Rating matches
9 +3
Record
3–6 Previous month 2–4
Opponents
8 +4
Events
3 0

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.

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 Alexander Ciornii
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
Method Submission 00:45 0–0
Marginal influence -7
Loss
September 20, 2025 Kristian Langer
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
Method Points 04:00 2–4
Marginal influence -16
Win
September 20, 2025 Maximilián Šesták
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
Method Submission 00:49 0–0
Marginal influence +18
Loss
September 20, 2025 Michal Mitlehner
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
Method Submission 01:19 0–0
Marginal influence -13
Loss
September 20, 2025 Michal Mitlehner
TATAMY 16 KIDS (No-GI and GI round robin) Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
Method Submission 03:30 0–7
Marginal influence -13
Relevant matches
8.2
Official ranking percentile
Top 67%
Performance
6.3 pp below expectation

8.2 weighted matches against 11 different opponents across 3 events

Weighted win rate
43.6%
Expected win rate
49.9%
Average opponent rating
1,364
Repeated-opponent share
15.4%
Network connectivity
80.9%

Classification evidence

Why U14?

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

  • U14 1 event vote Selected outcome

Registrations and outcomes

TATAMY 17 KIDS (No-GI and GI round robin)
U14 · Counts
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Competition age 11
CZECH FIGHTING SERIES 11, Samurai Cup 2025
Does not count
Grappling Gi / U12 Děti chlapci / -35 kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12
TATAMY 16 KIDS (No-GI and GI round robin)
Does not count
Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
  • Competition age 11

Classification evidence

Why ≤ 32 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

  • ≤ 32 kg 1 competition event Selected outcome
  • ≤ 35 kg 1 competition event
  • ≤ 36 kg 1 competition event

Registrations and outcomes

TATAMY 17 KIDS (No-GI and GI round robin)
≤ 36 kg · Counts as a competition event
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Registered weight class: -36 kg
  • Source competition limit: -36 kg

5 matches in the rating period

CZECH FIGHTING SERIES 11, Samurai Cup 2025
≤ 35 kg · Counts as a competition event
Grappling Gi / U12 Děti chlapci / -35 kg
  • Registered weight class: -35 kg
  • Source competition limit: -35 kg

3 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
≤ 32 kg · Counts as a competition event
Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
  • Registered weight class: -32 kg
  • Source competition limit: -32 kg

5 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 10 matches in the rating period Selected outcome

Registrations and outcomes

TATAMY 17 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 10-12 years / Boys / White/grey belt / -36 kg
  • Source belt category: grey

5 matches in the rating period

TATAMY 16 KIDS (No-GI and GI round robin)
grey · Counts as a match
Kids / Gi / 10-12 years / Boys / White/grey belt / -32 kg
  • Source belt category: grey

5 matches in the rating period