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Alex Catalin Ersen

Team Ersen

W–L
4–2
Won and lost rating-eligible matches in the past 12 months.
Gi
1,245
Rating based on Gi matches in the past 12 months.
No-Gi
1,262
Rating based on No-Gi matches in the past 12 months.
Current form
4–2
Results from the ten most recent rating-eligible matches.
Opponents
5
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
6
Silver
2
Bronze
0
Total medals
8
Events with results
5

Full career record

Wins
14
Losses
4
Matches
18
Win rate
77.8%

Ways of winning

Submission
9
Points
4
Decision
1
Disqualification
0

Personal records

Longest winning streak
9
Longest submission streak
4
Longest gold streak
3

Recent recorded placements

  3. WORLD CUP BJJ 2025

    ES Event record 5–0

    • Kids Boys GI / White / Infantil A / -26,0 kg
    • Kids Boys NO-GI / White / Infantil A / -26,0 kg

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
5
Distinct events
2

Ways of winning

  • Submission 3 75%
  • Points 1 25%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1245
Record
1–0
Win rate
100%
Submission share
100%

No-Gi

Rating
1262
Record
3–2
Win rate
60%
Submission share
67%

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
1,317
Change over 90 days
+27
Highest rating in 12 months
1,448
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,306
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
17%
Effective evidence
4.5
Confidence
69/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 8–2 8–2 across 10 rematches against 2 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #875 Jon Asensio · COSTA DAURADA BJJ CUP GI & NO-GI 2025 Sub 02:34 0–2

Full career

  1. #474 Luca Setien · WORLD CUP BJJ 2025 Sub 01:20 5–0
  2. #875 Jon Asensio · COSTA DAURADA BJJ CUP GI & NO-GI 2025 Sub 02:34 0–2 Earlier · Pts 10–2 June 28, 2025 · WORLD CUP BJJ 2025

Rivals

Opponent Head-to-head record Matches
Jon Asensio 6–2 8

Around this athlete

Athlete Rank Rating
Arthur Silva #1650 1,317
Alex Catalin Ersen #1651 1,317
Elias Zwicky #1652 1,317

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 0 Rating 1,317

Rating-period composition

Rating matches
6 0
Record
4–2 Previous month 4–2
Opponents
5 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 1,317

Rating-period composition

Rating matches
6 0
Record
4–2 Previous month 4–2
Opponents
5 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 · 5 left period Change -113 Rating 1,318

Rating-period composition

Rating matches
6 -5
Record
4–2 Previous month 9–2
Opponents
5 -3
Events
2 -1

5 older matches left the 12-month period: 5 won and 0 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

May 2026 No new matches Change +2 Rating 1,431

Rating-period composition

Rating matches
11 0
Record
9–2 Previous month 9–2
Opponents
8 0
Events
3 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 · 5 left period Change -20 Rating 1,429

Rating-period composition

Rating matches
11 -5
Record
9–2 Previous month 13–3
Opponents
8 0
Events
3 -1

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

March 2026 No new matches Change +7 Rating 1,449

Rating-period composition

Rating matches
16 0
Record
13–3 Previous month 13–3
Opponents
8 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.

February 2026 No new matches Change +2 Rating 1,442

Rating-period composition

Rating matches
16 0
Record
13–3 Previous month 13–3
Opponents
8 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.

January 2026 No new matches Change -1 Rating 1,440

Rating-period composition

Rating matches
16 0
Record
13–3 Previous month 13–3
Opponents
8 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.

December 2025 No new matches Change -1 Rating 1,441

Rating-period composition

Rating matches
16 0
Record
13–3 Previous month 13–3
Opponents
8 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.

November 2025 No new matches · 2 left period Change -6 Rating 1,442

Rating-period composition

Rating matches
16 -2
Record
13–3 Previous month 14–4
Opponents
8 -2
Events
4 -1

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

October 2025 3 new matches Change +19 Rating 1,448

Rating-period composition

Rating matches
18 +3
Record
14–4 Previous month 12–3
Opponents
10 +3
Events
5 +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
EUROPE CUP BJJ 2025 - ETAPA FINAL Kids Boys NO-GI / White / Infantil A / -29,0 kg
Method Submission 01:33 2–6
Marginal influence -32
Win
EUROPE CUP BJJ 2025 - ETAPA FINAL Kids Boys NO-GI / White / Infantil A / -29,0 kg
Method Points 03:00 8–2
Marginal influence +24
Win
October 18, 2025 Hovhannes Hovhannisyan
EUROPE CUP BJJ 2025 - ETAPA FINAL Kids Boys GI / White / Infantil A / -26,0 kg
Method Submission 01:19 6–0
Marginal influence +9
September 2025 3 new matches Change +8 Rating 1,429

Rating-period composition

Rating matches
15 +3
Record
12–3 Previous month 10–2
Opponents
7 +1
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.
Win
September 27, 2025 Jon Asensio
COSTA DAURADA BJJ CUP GI & NO-GI 2025 Kids Boys NO-GI / White / Infantil A / -26,0 kg
Method Submission 02:34 0–2
Marginal influence +16
Win
September 27, 2025 Cesar Sauras Tajuelo
COSTA DAURADA BJJ CUP GI & NO-GI 2025 Kids Boys NO-GI / White / Infantil A / -26,0 kg
Method Submission 01:31 12–0
Marginal influence +19
Loss
September 27, 2025 Jon Asensio
COSTA DAURADA BJJ CUP GI & NO-GI 2025 Kids Boys NO-GI / White / Infantil A / -26,0 kg
Method Points 03:00 0–6
Marginal influence -25
Relevant matches
4.5
Official ranking percentile
Top 54%
Performance
-

4.5 weighted matches against 5 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,306
Repeated-opponent share
16.7%
Network connectivity
80.9%

Classification evidence

Why U10?

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

  • U10 1 event vote Selected outcome

Registrations and outcomes

EUROPE CUP BJJ 2025 - ETAPA FINAL
U10 · Counts
Kids Boys GI / White / Infantil A / -26,0 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
Kids Boys NO-GI / White / Infantil A / -29,0 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10
COSTA DAURADA BJJ CUP GI & NO-GI 2025
Does not count
Kids Boys NO-GI / White / Infantil A / -26,0 kg
  • Competition age 8
  • Registered age: u10
  • Source category: u10

Classification evidence

Why ≤ 26 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

  • ≤ 26 kg 1 competition event Selected outcome

Registrations and outcomes

EUROPE CUP BJJ 2025 - ETAPA FINAL
≤ 26 kg · Does not count
Kids Boys GI / White / Infantil A / -26,0 kg
  • Registered weight class: -26,0 kg
  • Source competition limit: -26,0 kg

1 match in the rating period · conflicting upper weight limits make this event ambiguous

EUROPE CUP BJJ 2025 - ETAPA FINAL
≤ 29 kg · Does not count
Kids Boys NO-GI / White / Infantil A / -29,0 kg
  • Registered weight class: -29,0 kg
  • Source competition limit: -29,0 kg

2 matches in the rating period · conflicting upper weight limits make this event ambiguous

COSTA DAURADA BJJ CUP GI & NO-GI 2025
≤ 26 kg · Counts as a competition event
Kids Boys NO-GI / White / Infantil A / -26,0 kg
  • Registered weight class: -26,0 kg
  • Source competition limit: -26,0 kg

3 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 6 matches in the rating period Selected outcome

Registrations and outcomes

EUROPE CUP BJJ 2025 - ETAPA FINAL
white · Counts as a match
Kids Boys NO-GI / White / Infantil A / -29,0 kg
  • Source belt category: white

2 matches in the rating period

EUROPE CUP BJJ 2025 - ETAPA FINAL
white · Counts as a match
Kids Boys GI / White / Infantil A / -26,0 kg
  • Source belt category: white

1 match in the rating period

COSTA DAURADA BJJ CUP GI & NO-GI 2025
white · Counts as a match
Kids Boys NO-GI / White / Infantil A / -26,0 kg
  • Source belt category: white

3 matches in the rating period