UFC Fight Night: Blanchfield vs. Barber
Las Vegas, USA
31 May 2025
Women's Featherweight
VS
41%
Vieira
59%
Chiasson
Win Probability
Decision
Round 3 · 5:00
Combatrics Intelligence
Data-driven breakdown · fighter metrics
Edge: Chiasson
This is a genuine toss-up — Vieira at 41% vs Chiasson at 59% (CFR ratings). One of the hardest fights to call on the card.
Key angles
The CFR gap of 19 points suggests a clear performance difference on paper.
Chiasson has beaten significantly higher-quality opposition — a QoV edge of 22 points.
Chiasson has the striking edge in both volume and accuracy.
Risk flags
Chiasson has a chin rating of 58 — a potential KO vulnerability.
Vieira
Chiasson
Physical Matchup
Height · Reach · Age · Stance
5'8"
Height
+5'11"
68"
Reach
+72"
34
Age
34
Orthodox
Stance
Orthodox
Vieira
Chiasson
Composite Fighter Rating
Overall score combining performance, win quality, momentum & durability
42.2
61.5
43.7
Performance Avg
53.0
28
Quality of Victory
50
45
Momentum Score
96
Vieira
Chiasson
Striking
Significant strikes per minute & accuracy
0.9
1.0
41%
Strike Accuracy
47%
1.3
Striking Style Score (/10)
3.6
0 KOs
KO Finishes
2 KOs
Strike targetStrike target
8
Head
3
0
Body
1
0
Leg
1
RangeRange
2Distance3
0Clinch2
6Ground0
Vieira
Chiasson
Grappling
Takedowns, submissions & wrestling
—
—
—
Sub Attempts / fight
0.2
3.0
Grappling Style Score (/10)
2.9
2.1
Wrestling Style Score (/10)
2.0
0:00
Control Time (this fight)
0:00
0
Reversals
0
Vieira
Chiasson
Durability / Chin
Resilience against knockouts and stoppages
70
58
Moderate
Verdict
KO risk
1
KO/TKO Losses
1
0
Sub Losses
1
Avg R1.0 stoppage
KO round context
Avg R3.0 stoppage
10 fights ago
Last KO loss
5 fights ago
—
Strikes absorbed / min
—
15/21 fights
Chin rating based on
14/17 fights
Vieira
Chiasson
Form & Momentum
Recent fight performance — most recent weighted 30%
45
96
Current form
3-fight 📉 slide
W · Dec · R3
L · Dec · R3
W · Dec · R3
L · Dec · R3
W · Dec · R3
Last 5
L · Dec · R3
L · Dec · R3
L · Dec · R3
W · R2
W · Sub · R1
Vieira
Chiasson
Finish Rate
Percentage of wins by KO/TKO or Submission
10%
50%
0
KO / TKO Wins
2
1
Submission Wins
2
9
Decision Wins
4
Style Fingerprint
Combatrics radar — 6 fighting dimensions scored 0–10
Vieira
Chiasson
Fighter 1
Fighter 2
1.3
Striking
KO power & stand-up volume
3.6
3.0
Grappling
Ground control & clinch
2.9
2.1
Wrestling
Takedown threat & defence
2.0
1.0
Submission
Submission attack frequency
2.5
2.7
Pressure
Clinch/ground work rate
5.2
8.5
Volume
Decision-pace fighting
4.1
VieiraChiasson
Strike Zones
Vieira
Attacking
8 landedAbsorbing
5 absorbedChiasson
Attacking
5 landedAbsorbing
8 absorbedTargeting Overlap
🎯Vieira targets the head (100% of attacks) — Chiasson absorbs 100% of strikes there
🎯Chiasson targets the head (60% of attacks) — Vieira absorbs 60% of strikes there
Round by Round
This fight · per-round breakdown
Vieira
RND
Chiasson
0/0R00/0
Vieira · QOF Timeline
Avg: 5.1WinLossTrend
Chiasson · QOF Timeline
Avg: 5.1WinLossTrend
Vieira · Last 5
W · Dec · R3
Jacqueline CavalcantiRating 5.4Decision
UFC Fight Night: Allen vs. Costa · 2026-05
L · Dec · R3
Norma DumontRating 6Decision
UFC Fight Night: Garcia vs. Onama · 2025-11
W · Dec · R3
Macy ChiassonRating 5.8Decision
UFC Fight Night: Blanchfield vs. Barber · 2025-05
L · Dec · R3
Kayla HarrisonRating 7.6Decision
UFC 307: Pereira vs. Rountree Jr. · 2024-10
W · Dec · R3
Pannie KianzadRating 4.5Decision
UFC Fight Night: Aspinall vs. Tybura · 2023-07
Chiasson · Last 5
L · Dec · R3
Ailin PerezRating 6.5Decision
UFC Fight Night: Moreno vs. Kavanagh · 2026-02
L · Dec · R3
Yana SantosRating 5.6Decision
UFC 320: Ankalaev vs. Pereira 2 · 2025-10
L · Dec · R3
Ketlen VieiraRating 5.9Decision
UFC Fight Night: Blanchfield vs. Barber · 2025-05
W · R2
Mayra Bueno SilvaRating 4.9UFC 303: Pereira vs. Prochazka 2 · 2024-06
W · Sub · R1
Pannie KianzadRating 5Submission
UFC Fight Night: Tuivasa vs. Tybura · 2024-03