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Zedek Vroon

Haven BJJ

W–L
8–9
Won and lost rating-eligible matches in the past 12 months.
Gi
1,324
Rating based on Gi matches in the past 12 months.
No-Gi
1,360
Rating based on No-Gi matches in the past 12 months.
Current form
7–3
Results from the ten most recent rating-eligible matches.
Opponents
16
Unique opponents faced in rating-eligible matches in the past 12 months.

Scheduled

Tournament history

Events

9
Events
Date Event Result Format Division
Grappling Industries AMSTERDAM the Netherlands · Gi · 16–17 yo · white · ≤170 lb ; No-Gi · 14–15 yo · white/grey · ≤170 lb 3–2 W–L: Win / Loss GiNo-Gi
  • No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
  • Place #5
GrappleCity: Rotterdam Spring Open the Netherlands · Gi · 12–13 yo · yellow/orange · ≤65 kg ; No-Gi · 12–13 yo · yellow/orange · ≤65 kg 2–0 W–L: Win / Loss GiNo-Gi
  • Teens Gi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Teens NoGi / Yellow/Orange / 12-13 years / -65kg / Boy
The Future League 8 – Gi & No-Gi the Netherlands · 22 ; Gi · ≤37 kg 6–2 W–L: Win / Loss Gi
GrappleCity: Rotterdam Winter Open the Netherlands · No-Gi · 14–15 yo · yellow/orange · ≤70 kg 0–1 W–L: Win / Loss No-Gi
  • Teens NoGi / Yellow/Orange / 14-15 years / -70kg / Boy
Lion Cub Jiu Jitsu Competition 5 the Netherlands · No-Gi · 12–15 yo · grey · ≤70/75 kg 1–1 W–L: Win / Loss No-Gi
  • Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
'The Future League 7' by VERSUS the Netherlands · Gi · 12–14 yo · grey/orange · ≥70 kg 0–3 W–L: Win / Loss Gi
  • Place #4
NAGA Amsterdam Grappling Championship the Netherlands · Gi · 12–13 yo · 65–69.9 kg ; No-Gi · 12–13 yo · 65–69.9 kg 1–4 W–L: Win / Loss GiNo-Gi
  • Children No-Gi (Male) / Beginner / 65 - 69.9 / 12-13 years
  • Children Gi (Male) / Beginner / 65 - 69.9 / 12-13 years
Lion Cub Jiu Jitsu Competition 4 the Netherlands · Gi · 12 yo · grey/yellow · ≤60/65/70 kg 3–0 W–L: Win / Loss Gi
  • Boys GI / 12 years old (DAY 1: Saturday) / Grey & Yellow belt / -60 & -65 & -70 kg
Lion Cub Jiu Jitsu Competition 3 the Netherlands · Gi · white · ≤55 kg 2–1 W–L: Win / Loss Gi
  • Boys / 10 - 12 Boys / White / -55 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 · 5 left period Change +19 Rating 1,403

Rating-period composition

Rating matches
17 -5
Record
8–9 Previous month 9–13
Opponents
16 -1
Events
6 -1

5 older matches left the 12-month period: 1 won and 4 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

July 2026 No new matches Change +1 Rating 1,384

Rating-period composition

Rating matches
22 0
Record
9–13 Previous month 9–13
Opponents
17 0
Events
7 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 +5 Rating 1,383

Rating-period composition

Rating matches
22 0
Record
9–13 Previous month 9–13
Opponents
17 0
Events
7 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 1,378

Rating-period composition

Rating matches
22 0
Record
9–13 Previous month 9–13
Opponents
17 0
Events
7 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 · 3 left period Change -37 Rating 1,379

Rating-period composition

Rating matches
22 -3
Record
9–13 Previous month 12–13
Opponents
17 -3
Events
7 -1

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.

March 2026 5 new matches Change +36 Rating 1,416

Rating-period composition

Rating matches
25 +5
Record
12–13 Previous month 9–11
Opponents
20 +5
Events
8 +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
March 1, 2026 Casper Ossewaarde
Grappling Industries AMSTERDAM Gi Kids / 16 - 17 years (Male) / White / -170 lbs
Method Submission 03:14 0–6
Marginal influence -8
Win
March 1, 2026 Leon Gauvrit
Grappling Industries AMSTERDAM Gi Kids / 16 - 17 years (Male) / White / -170 lbs
Method Points 04:00 10–0
Marginal influence +15
Loss
March 1, 2026 Mohammed Labidi
Grappling Industries AMSTERDAM No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
Method Submission 01:49 0–10
Marginal influence -7
Win
March 1, 2026 Hamza Dogan
Grappling Industries AMSTERDAM No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
Method Points 04:00 2–0
Marginal influence +10
Win
March 1, 2026 Victor Butenco
Grappling Industries AMSTERDAM No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
Method Submission 02:27 6–0
Marginal influence +11
February 2026 2 new matches Change +47 Rating 1,380

Rating-period composition

Rating matches
20 +2
Record
9–11 Previous month 7–11
Opponents
15 +1
Events
7 +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
February 22, 2026 Pavel Sacha
GrappleCity: Rotterdam Spring Open Teens NoGi / Yellow/Orange / 12-13 years / -65kg / Boy
Method Submission 01:22 0–2
Marginal influence +16
Win
February 22, 2026 Pavel Sacha
GrappleCity: Rotterdam Spring Open Teens Gi / Yellow/Orange / 12-13 years / -65kg / Boy
Method Submission 02:38 4–0
Marginal influence +18
January 2026 No new matches Change -6 Rating 1,333

Rating-period composition

Rating matches
18 0
Record
7–11 Previous month 7–11
Opponents
14 0
Events
6 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 1,339

Rating-period composition

Rating matches
18 0
Record
7–11 Previous month 7–11
Opponents
14 0
Events
6 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 Change +31 Rating 1,339

Rating-period composition

Rating matches
18 +5
Record
7–11 Previous month 5–8
Opponents
14 +5
Events
6 +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
November 30, 2025 Twan De Gruijl
The Future League 8 – Gi & No-Gi Gi-37
Method Submission 01:46 6–0
Marginal influence +7
Win
November 30, 2025 Piotr Lobos
The Future League 8 – Gi & No-Gi Gi-37
Method Points 03:00 0–0
Marginal influence +18
Loss
November 30, 2025 Jethro Rosies
The Future League 8 – Gi & No-Gi Gi-37
Method Points 03:00 0–5
Marginal influence -9
Loss
November 30, 2025 Joao Paulo Lelles
The Future League 8 – Gi & No-Gi Gi-37
Method Submission 01:44 0–0
Marginal influence -12
Loss
November 9, 2025 Kenan Tuglaci
GrappleCity: Rotterdam Winter Open Teens NoGi / Yellow/Orange / 14-15 years / -70kg / Boy
Method Points 04:00 2–7
Marginal influence -8
October 2025 2 new matches · 3 left period Change -15 Rating 1,308

Rating-period composition

Rating matches
13 -1
Record
5–8 Previous month 6–8
Opponents
9 -1
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.
Loss
October 25, 2025 Samuel Harmsen
Lion Cub Jiu Jitsu Competition 5 Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
Method Points 04:00 0–5
Marginal influence -9
Win
October 25, 2025 Lex Van Drempt
Lion Cub Jiu Jitsu Competition 5 Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
Method Points 04:00 2–0
Marginal influence +15
September 2025 3 new matches Change -20 Rating 1,323

Rating-period composition

Rating matches
14 +3
Record
6–8 Previous month 6–5
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.
Loss
September 21, 2025 Bheem Chaitoe
'The Future League 7' by VERSUS -65&70+kg / 12&14yr / Grey&Orange
Method Points 04:00 0–9
Marginal influence -17
Loss
September 21, 2025 Joël Noten
'The Future League 7' by VERSUS -65&70+kg / 12&14yr / Grey&Orange
Method Submission 02:00 0–8
Marginal influence -8
Loss
September 21, 2025 Cristiano Luis
'The Future League 7' by VERSUS -65&70+kg / 12&14yr / Grey&Orange
Method Submission 00:48 0–0
Marginal influence -7
Relevant matches
13.8
Official ranking percentile
Top 27%
Performance
9.3 pp above expectation

13.8 weighted matches against 16 different opponents across 6 events

Weighted win rate
48.4%
Expected win rate
39.1%
Average opponent rating
1,352
Repeated-opponent share
5.9%
Network connectivity
87.6%

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 3 event votes Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
U14 · Counts
Teens Gi / Grey / 12-13 years / -75kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Teens NoGi / Grey / 12-13 years / -75kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Grappling Industries AMSTERDAM
U14 · Counts
No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
  • Competition age 13
  • Registered age: u16
  • Source category: u16
Gi Kids / 16 - 17 years (Male) / White / -170 lbs
  • Competition age 13
  • Registered age: u18
  • Source category: u18
GrappleCity: Rotterdam Spring Open
U14 · Counts
Teens NoGi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Teens Gi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14
The Future League 8 – Gi & No-Gi
Does not count
Gi-37
  • Competition age 12
  • Registered age: u16
  • Source category: u16
22
  • Competition age 12
  • Registered age: u16
  • Source category: u16
GrappleCity: Rotterdam Winter Open
Does not count
Teens NoGi / Yellow/Orange / 14-15 years / -70kg / Boy
  • Competition age 12
  • Registered age: u16
  • Source category: u16
Lion Cub Jiu Jitsu Competition 5
Does not count
Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
  • Competition age 12
  • Registered age: u16
  • Source category: u16
'The Future League 7' by VERSUS
Does not count
-65&70+kg / 12&14yr / Grey&Orange
  • Competition age 12

Classification evidence

Why ≤ 65 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

  • ≤ 65 kg 1 competition event Selected outcome
  • ≤ 70 kg 1 competition event
  • ≤ 77 kg 1 competition event

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
Does not count
Teens Gi / Grey / 12-13 years / -75kg / Boy
  • Registered weight class: -75kg
  • Source competition limit: -75kg

No matches in the rating period · no valid weight evidence

GrappleCity: Rotterdam Summer Open
Does not count
Teens NoGi / Grey / 12-13 years / -75kg / Boy
  • Registered weight class: -75kg
  • Source competition limit: -75kg

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
≤ 77 kg · Counts as a competition event
No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

3 matches in the rating period

Grappling Industries AMSTERDAM
≤ 77 kg · Counts as a competition event
Gi Kids / 16 - 17 years (Male) / White / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

2 matches in the rating period

GrappleCity: Rotterdam Spring Open
≤ 65 kg · Counts as a competition event
Teens NoGi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Registered weight class: -65kg
  • Source competition limit: -65kg

1 match in the rating period

GrappleCity: Rotterdam Spring Open
≤ 65 kg · Counts as a competition event
Teens Gi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Registered weight class: -65kg
  • Source competition limit: -65kg

1 match in the rating period

The Future League 8 – Gi & No-Gi
Does not count
Gi-37

4 matches in the rating period · weight class could not be normalized reliably

The Future League 8 – Gi & No-Gi
Does not count
22

No matches in the rating period · no valid weight evidence

GrappleCity: Rotterdam Winter Open
≤ 70 kg · Counts as a competition event
Teens NoGi / Yellow/Orange / 14-15 years / -70kg / Boy
  • Registered weight class: -70kg
  • Source competition limit: -70kg

1 match in the rating period

Lion Cub Jiu Jitsu Competition 5
≤ 70 kg · Does not count
Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
  • Registered weight class: -70 kg
  • Source competition limit: -70 kg

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

'The Future League 7' by VERSUS
Does not count
-65&70+kg / 12&14yr / Grey&Orange
  • Registered weight class: -65&70+kg
  • Source competition limit: -65&70+kg

3 matches in the rating period · weight class could not be normalized reliably

Classification evidence

Why Orange?

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

  • orange 6 matches in the rating period Selected outcome
  • white 5 matches in the rating period
  • grey 2 matches in the rating period

Registrations and outcomes

Grappling Industries AMSTERDAM
white · Counts as a match
Gi Kids / 16 - 17 years (Male) / White / -170 lbs
  • Source belt category: white

2 matches in the rating period

Grappling Industries AMSTERDAM
white · Counts as a match
No Gi Kids / 14 - 15 years (Male) / Beginner (White and Grey) / -170 lbs
  • Source belt category: white

3 matches in the rating period

GrappleCity: Rotterdam Spring Open
orange · Counts as a match
Teens NoGi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Source belt category: orange

1 match in the rating period

GrappleCity: Rotterdam Spring Open
orange · Counts as a match
Teens Gi / Yellow/Orange / 12-13 years / -65kg / Boy
  • Source belt category: orange

1 match in the rating period

GrappleCity: Rotterdam Winter Open
orange · Counts as a match
Teens NoGi / Yellow/Orange / 14-15 years / -70kg / Boy
  • Source belt category: orange

1 match in the rating period

Lion Cub Jiu Jitsu Competition 5
grey · Counts as a match
Boys NO-GI / 12 - 15 years old (DAY 1: Saturday) / Grey belt / -70 & -75 kg
  • Source belt category: grey

2 matches in the rating period

'The Future League 7' by VERSUS
orange · Counts as a match
-65&70+kg / 12&14yr / Grey&Orange
  • Source belt category: orange

3 matches in the rating period