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David Grilo Duarte

Ground58 Jiu Jitsu

W–L
1–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,175
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
1–2
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
2026-05-23 Lilith Gravenstein
Loss
NAGA Germany Grappling Championship Gi · Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
2026-05-23 Sasha Martin
Loss
NAGA Germany Grappling Championship Gi · Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
2026-05-23 Phillip Veilegaard
Win
NAGA Germany Grappling Championship Gi · Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years

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 +5 Rating 1,175

Rating-period composition

Rating matches
3 0
Record
1–2 Previous month 1–2
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 +3 Rating 1,170

Rating-period composition

Rating matches
3 0
Record
1–2 Previous month 1–2
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 -1 Rating 1,167

Rating-period composition

Rating matches
3 0
Record
1–2 Previous month 1–2
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 3 new matches Change Starting point Rating 1,168

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
NAGA Germany Grappling Championship Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
Method Decision 0–0
Marginal influence -37
Loss
May 23, 2026 Sasha Martin
NAGA Germany Grappling Championship Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
Method Submission 01:23 0–0
Marginal influence -38
Win
NAGA Germany Grappling Championship Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
Method Submission 00:49 0–0
Marginal influence +41
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
1,262
Repeated-opponent share
0.0%
Network connectivity
80.9%

Classification evidence

Why U16?

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

  • U16 1 event vote Selected outcome

Registrations and outcomes

NAGA Germany Grappling Championship
U16 · Counts
Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
  • Competition age 15
  • Registered age: u16
  • Source category: u16

Classification evidence

Why ≤ 60 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

  • ≤ 60 kg 1 competition event Selected outcome

Registrations and outcomes

NAGA Germany Grappling Championship
≤ 60 kg · Counts as a competition event
Teens Gi (Male) / Novice / 55 - 59.9 / 14-15 years
  • Registered weight class: 55 - 59.9
  • Source competition limit: 55 - 59.9

3 matches in the rating period