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Zackary SIERRA

FLOW JIUJITSU

W–L
0–15
Won and lost rating-eligible matches in the past 12 months.
Gi
1,052
Rating based on Gi matches in the past 12 months.
No-Gi
1,063
Rating based on No-Gi matches in the past 12 months.
Current form
0–10
Results from the ten most recent rating-eligible matches.
Opponents
11
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
0
Silver
0
Bronze
0
Total medals
0
Events with results
2

Full career record

Wins
1
Losses
15
Matches
16
Win rate
6.2%

Ways of winning

Submission
0
Points
0
Decision
0
Disqualification
0

Personal records

Longest winning streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
11
Distinct events
2

Ways of winning

  • Submission 0
  • Points 0
  • Decision 0
  • Other recorded result 0

Gi versus No-Gi

Gi

Rating
1052
Record
0–8
Win rate
0%
Submission share
-

No-Gi

Rating
1063
Record
0–7
Win rate
0%
Submission share
-

Win quality

Grouped by pre-match win probability. This provides context and does not award an extra rating bonus.

As underdog 0–0 Less than 35% expected win probability before the match.
Even match 0–0 Between 35% and 65% expected win probability before the match.
As favourite 0–0 More than 65% expected win probability before the match.

Development

Rating and development

The same published rating, supported by trend, opponent strength and evidence quality.

Current rating
1,133
Change over 90 days
-43
Highest rating in 12 months
1,173
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,393
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
27%
Effective evidence
10.8
Confidence
87/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 1–9 1–9 across 10 rematches against 5 repeat opponents.

Rivals

Opponent Head-to-head record Matches
Amine Es Saad 1–1 2
Faheem Misiatu 0–2 2
Kais Mongin 0–2 2

Around this athlete

Athlete Rank Rating
Lilly Böll #1430 1,133
Zackary SIERRA #1431 1,133
Milosz Kirchner #1432 1,133

Recent tournaments

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 +3 Rating 1,133

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 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 -1 Rating 1,130

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 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 +3 Rating 1,131

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 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 1,128

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 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 1,127

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 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 0 Rating 1,130

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

February 2026 No new matches Change 0 Rating 1,130

Rating-period composition

Rating matches
15 0
Record
0–15 Previous month 0–15
Opponents
11 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

January 2026 7 new matches Change -47 Rating 1,130

Rating-period composition

Rating matches
15 +7
Record
0–15 Previous month 0–8
Opponents
11 +6
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.
Loss
January 11, 2026 Kiram Moussa
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
Method Points 04:00 2–5
Marginal influence -10
Loss
January 11, 2026 Dimitri DISCI
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
Method Submission 01:15 0–9
Marginal influence -4
Loss
January 11, 2026 Axel Berrivin
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
Method Points 04:00 0–27
Marginal influence -7
Loss
January 11, 2026 Kiram Moussa
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
Method Points 04:00 0–12
Marginal influence -7
Loss
January 11, 2026 Gabriel Denel
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
Method Points 04:00 0–0
Marginal influence -9
Loss
January 11, 2026 Gabriel Paiva
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
Method Points 04:00 0–6
Marginal influence -8
Loss
January 11, 2026 Ayoub Bouguerra
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
Method Points 04:00 0–10
Marginal influence -12
December 2025 No new matches Change 0 Rating 1,177

Rating-period composition

Rating matches
8 0
Record
0–8 Previous month 0–8
Opponents
5 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.

November 2025 No new matches Change +1 Rating 1,177

Rating-period composition

Rating matches
8 0
Record
0–8 Previous month 0–8
Opponents
5 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.

October 2025 No new matches Change +3 Rating 1,176

Rating-period composition

Rating matches
8 0
Record
0–8 Previous month 0–8
Opponents
5 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.

September 2025 8 new matches Change Starting point Rating 1,173

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 28, 2025 Raphaël Pastour
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
Method Submission 00:55 0–9
Marginal influence -2
Loss
September 28, 2025 Raphael Chenoufi
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
Method Submission 01:54 0–11
Marginal influence -1
Loss
September 28, 2025 Faheem Misiatu
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
Method Submission 00:28 0–6
Marginal influence -5
Loss
September 28, 2025 Kais Mongin
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
Method Points 03:58 0–12
Marginal influence -12
Loss
September 28, 2025 Amine Es Saad
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
Method Submission 00:35 0–0
Marginal influence -6
Loss
September 28, 2025 Faheem Misiatu
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
Method Submission 00:09 0–0
Marginal influence -7
Loss
September 28, 2025 Raphael Chenoufi
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
Method Points 04:00 0–13
Marginal influence -3
Loss
September 28, 2025 Kais Mongin
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
Method Points 04:00 4–15
Marginal influence -8
Relevant matches
10.8
Official ranking percentile
Top 96%
Performance
-

10.8 weighted matches against 11 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,393
Repeated-opponent share
26.7%
Network connectivity
87.6%

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

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
U16 · Counts
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
  • Competition age 15
  • Registered age: u16
  • Source category: u16
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
  • Competition age 15
  • Registered age: u16
  • Source category: u16
OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
Does not count
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
  • Competition age 14
  • Registered age: u16
  • Source category: u16
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
  • Competition age 14
  • Registered age: u16
  • Source category: u16

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
  • ≤ 69 kg 1 competition event

Registrations and outcomes

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
≤ 65 kg · Counts as a competition event
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
  • Registered weight class: -65,10 kg
  • Source competition limit: -65,10 kg

3 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
≤ 65 kg · Counts as a competition event
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
  • Registered weight class: -65,10 kg
  • Source competition limit: -65,10 kg

4 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
≤ 69 kg · Counts as a competition event
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
  • Registered weight class: -69,20 kg
  • Source competition limit: -69,20 kg

4 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
≤ 69 kg · Counts as a competition event
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
  • Registered weight class: -69,20 kg
  • Source competition limit: -69,20 kg

4 matches in the rating period

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 15 matches in the rating period Selected outcome

Registrations and outcomes

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
white · Counts as a match
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -65,10 kg
  • Source belt category: white

3 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
white · Counts as a match
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -65,10 kg
  • Source belt category: white

4 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
white · Counts as a match
KIDS NOGI / Garçon / Teen III (14-15 ans) / Blanche (White) / -69,20 kg
  • Source belt category: white

4 matches in the rating period

OSS BJJ TOURNAMENT ROUND ROBIN | POINTS RULES
white · Counts as a match
KIDS GI / Garçon / Blanche (White) / Teen III (14-15 ans) / -69,20 kg
  • Source belt category: white

4 matches in the rating period