TopBJJ Index Youth

TopBJJ Index

Search TopBJJ Index
Language selector
Menu
NL

Serhat Oztas

Gym Noord

W–L
2–1
Won and lost rating-eligible matches in the past 12 months.
Gi
-
Rating based on Gi matches in the past 12 months.
No-Gi
1,288
Rating based on No-Gi matches in the past 12 months.
Current form
2–1
Results from the ten most recent rating-eligible matches.
Opponents
3
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

3
Indexed competition matches
Date Opponent Result Event Division
2026-02-22 Salih Eymen Altun
Loss
GrappleCity: Rotterdam Spring Open No-Gi · Kids NoGi / Grey / Kids 8-9 years / -35kg
2026-02-22 Inara Guendoul
Win
GrappleCity: Rotterdam Spring Open No-Gi · Kids NoGi / Grey / Kids 8-9 years / -35kg
2026-02-22 Leandro Weidner
Win
GrappleCity: Rotterdam Spring Open No-Gi · Kids NoGi / Grey / Kids 8-9 years / -35kg

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 1,288

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 +2 Rating 1,288

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 +4 Rating 1,286

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 0 Rating 1,282

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 1,282

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 Change -5 Rating 1,279

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
3 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 3 new matches Change Starting point Rating 1,284

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
February 22, 2026 Salih Eymen Altun
GrappleCity: Rotterdam Spring Open Kids NoGi / Grey / Kids 8-9 years / -35kg
Method Points 03:00 7–8
Marginal influence -41
Win
February 22, 2026 Inara Guendoul
GrappleCity: Rotterdam Spring Open Kids NoGi / Grey / Kids 8-9 years / -35kg
Method Submission 01:00 0–4
Marginal influence +31
Win
February 22, 2026 Leandro Weidner
GrappleCity: Rotterdam Spring Open Kids NoGi / Grey / Kids 8-9 years / -35kg
Method Disqualification 00:50 2–0
Marginal influence +61
Relevant matches
2.3
Official ranking percentile
-
Performance
-

2.3 weighted matches against 3 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,299
Repeated-opponent share
0.0%
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 1 event vote Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Spring Open
U12 · Counts
Kids NoGi / Grey / Kids 8-9 years / -35kg
  • Competition age 11
  • Registered age: u10
  • Source category: u10

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

Registrations and outcomes

GrappleCity: Rotterdam Spring Open
≤ 35 kg · Counts as a competition event
Kids NoGi / Grey / Kids 8-9 years / -35kg
  • Registered weight class: -35kg
  • Source competition limit: -35kg

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 3 matches in the rating period Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Spring Open
grey · Counts as a match
Kids NoGi / Grey / Kids 8-9 years / -35kg
  • Source belt category: grey

3 matches in the rating period