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Ayman Gerrit Bouwer

Haven BJJ

W–L
7–4
Won and lost rating-eligible matches in the past 12 months.
Gi
1,379
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
7–3
Results from the ten most recent rating-eligible matches.
Opponents
9
Unique opponents faced in rating-eligible matches in the past 12 months.

Scheduled

Tournament history

Events

5
Events
Date Event Result Format Division
All Stars BJJ Netherlands the Netherlands · Gi · grey · ≤34 kg 0–2 W–L: Win / Loss Gi Mightyabsolute / Male / Grey / Junior / Under 34kg
2026 AGF Antwerp Championships Belgium · Gi · 10–11 yo · white · ≤34 kg ; Gi · white · ≤34 kg 2–1 W–L: Win / Loss Gi
  • Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
GrappleCity: Rotterdam Summer Open the Netherlands · Gi · 10–11 yo · white · ≤35 kg 2–0 W–L: Win / Loss Gi
  • Kids Gi / White / Kids 10-11 years / -35kg
2026 AGF Netherlands Championships the Netherlands · Gi · 10–11 yo · white · ≤34 kg ; Gi · white · ≤34 kg 2–2 W–L: Win / Loss Gi
  • Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
GrappleCity: Rotterdam Spring Open the Netherlands · Gi · 10–11 yo · white · ≤40 kg 1–1 W–L: Win / Loss Gi
  • Kids Gi / White / Kids 10-11 years / -40kg

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 1,379

Rating-period composition

Rating matches
11 0
Record
7–4 Previous month 7–4
Opponents
9 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.

July 2026 No new matches Change 0 Rating 1,379

Rating-period composition

Rating matches
11 0
Record
7–4 Previous month 7–4
Opponents
9 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.

June 2026 3 new matches Change +19 Rating 1,379

Rating-period composition

Rating matches
11 +3
Record
7–4 Previous month 5–3
Opponents
9 +2
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
June 13, 2026 Mansur Inalkayev
2026 AGF Antwerp Championships Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
Method Submission 00:47 1–0
Marginal influence -20
Win
June 13, 2026 Julya Covyn
2026 AGF Antwerp Championships Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 01:08 2–0
Marginal influence +12
Win
June 13, 2026 Julya Covyn
2026 AGF Antwerp Championships Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 02:11 5–0
Marginal influence +12
May 2026 2 new matches Change +67 Rating 1,360

Rating-period composition

Rating matches
8 +2
Record
5–3 Previous month 3–3
Opponents
7 +2
Events
3 +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
GrappleCity: Rotterdam Summer Open Kids Gi / White / Kids 10-11 years / -35kg
Method Submission 00:40 0–0
Marginal influence +18
Win
May 23, 2026 Lukas Mok
GrappleCity: Rotterdam Summer Open Kids Gi / White / Kids 10-11 years / -35kg
Method Submission 00:28 6–0
Marginal influence +13
April 2026 4 new matches Change +76 Rating 1,293

Rating-period composition

Rating matches
6 +4
Record
3–3 Previous month 1–1
Opponents
5 +3
Events
2 +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 Keysan Anbarestani
2026 AGF Netherlands Championships Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
Method Submission 02:59 12–2
Marginal influence +16
Win
April 18, 2026 Imran Balakouh
2026 AGF Netherlands Championships Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
Method Points 03:00 10–0
Marginal influence +21
Loss
April 18, 2026 Rico Mulder
2026 AGF Netherlands Championships Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Points 03:00 1–6
Marginal influence -14
Loss
April 18, 2026 Rico Mulder
2026 AGF Netherlands Championships Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
Method Submission 02:08 4–6
Marginal influence -14
March 2026 No new matches Change +1 Rating 1,217

Rating-period composition

Rating matches
2 0
Record
1–1 Previous month 1–1
Opponents
2 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.

February 2026 2 new matches Change Starting point Rating 1,216

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 Lexi Van Geer
GrappleCity: Rotterdam Spring Open Kids Gi / White / Kids 10-11 years / -40kg
Method Submission 02:04 2–0
Marginal influence +17
Loss
February 22, 2026 Elise Plak
GrappleCity: Rotterdam Spring Open Kids Gi / White / Kids 10-11 years / -40kg
Method Submission 00:22 0–0
Marginal influence -24
Relevant matches
7.6
Official ranking percentile
Top 33%
Performance
9.8 pp above expectation

7.6 weighted matches against 9 different opponents across 4 events

Weighted win rate
66.3%
Expected win rate
56.5%
Average opponent rating
1,299
Repeated-opponent share
18.2%
Network connectivity
87.6%

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 5 event votes Selected outcome

Registrations and outcomes

All Stars BJJ Netherlands
U12 · Counts
Mightyabsolute / Male / Grey / Junior / Under 34kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12
2026 AGF Antwerp Championships
U12 · Counts
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Competition age 11
  • Registered age: u14
  • Source category: u14
Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Competition age 11
  • Registered age: u12
  • Source category: u12
GrappleCity: Rotterdam Summer Open
U12 · Counts
Kids Gi / White / Kids 10-11 years / -35kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12
2026 AGF Netherlands Championships
U12 · Counts
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Competition age 11
  • Registered age: u12
  • Source category: u12
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Competition age 11
  • Registered age: u12
  • Source category: u12
GrappleCity: Rotterdam Spring Open
U12 · Counts
Kids Gi / White / Kids 10-11 years / -40kg
  • Competition age 11
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 34 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

  • ≤ 34 kg 2 competition events Selected outcome
  • ≤ 35 kg 1 competition event

Registrations and outcomes

All Stars BJJ Netherlands
Does not count
Mightyabsolute / Male / Grey / Junior / Under 34kg
  • Registered weight class: Under 34kg
  • Source competition limit: Under 34kg

No matches in the rating period · no valid weight evidence

2026 AGF Antwerp Championships
≤ 34 kg · Counts as a competition event
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

1 match in the rating period

2026 AGF Antwerp Championships
≤ 34 kg · Counts as a competition event
Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

2 matches in the rating period

GrappleCity: Rotterdam Summer Open
≤ 35 kg · Counts as a competition event
Kids Gi / White / Kids 10-11 years / -35kg
  • Registered weight class: -35kg
  • Source competition limit: -35kg

2 matches in the rating period

2026 AGF Netherlands Championships
≤ 34 kg · Counts as a competition event
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

2 matches in the rating period

2026 AGF Netherlands Championships
≤ 34 kg · Counts as a competition event
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Registered weight class: Feather II (Up to 34.00 kg)
  • Source competition limit: Feather II (Up to 34.00 kg)

2 matches in the rating period

GrappleCity: Rotterdam Spring Open
≤ 40 kg · Does not count
Kids Gi / White / Kids 10-11 years / -40kg
  • Registered weight class: -40kg
  • Source competition limit: -40kg

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

Classification evidence

Why White?

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

  • white 11 matches in the rating period Selected outcome

Registrations and outcomes

2026 AGF Antwerp Championships
white · Counts as a match
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Source belt category: white

1 match in the rating period

2026 AGF Antwerp Championships
white · Counts as a match
Gi Kids / Mixed / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Source belt category: white

2 matches in the rating period

GrappleCity: Rotterdam Summer Open
white · Counts as a match
Kids Gi / White / Kids 10-11 years / -35kg
  • Source belt category: white

2 matches in the rating period

2026 AGF Netherlands Championships
white · Counts as a match
Gi Kids Challenger / Boys / White Challenger / Feather II (Up to 34.00 kg)
  • Source belt category: white

2 matches in the rating period

2026 AGF Netherlands Championships
white · Counts as a match
Gi Kids / Boys / Pre Teen (10 - 11 yrs) / White / Feather II (Up to 34.00 kg)
  • Source belt category: white

2 matches in the rating period

GrappleCity: Rotterdam Spring Open
white · Counts as a match
Kids Gi / White / Kids 10-11 years / -40kg
  • Source belt category: white

2 matches in the rating period