UFC 307: Pereira vs. Rountree Jr.
Salt Lake City, USA
5 Oct 2024
Women's Bantamweight
VS
35%
Vieira
65%
Harrison
Win Probability
Decision
Round 3 · 5:00
Ketlen
Ketlen Vieira
"Fenomeno"
16 – 5
5'8"68" reachOrthodox34 yrsWell-Rounded
CFR 42
Kayla
Kayla Harrison
19 – 1
Pressure Fighter3-fight win streak35 yrsSouthpaw66" reach5'8"
CFR 78

Combatrics Intelligence

Data-driven breakdown · fighter metrics

Edge: Harrison

Harrison holds a meaningful edge at 65% per the CFR ratings — but Vieira has real paths to victory.

Key angles

The CFR gap of 36 points suggests a clear performance difference on paper.

Harrison has beaten significantly higher-quality opposition — a QoV edge of 26 points.

Harrison has the striking edge in both volume and accuracy.

Vieira
Harrison
Physical Matchup
Height · Reach · Age · Stance
5'8"
Height
5'8"
68"+
Reach
66"
34+
Age
35
Orthodox
Stance
Southpaw
Vieira
Harrison
Composite Fighter Rating
Overall score combining performance, win quality, momentum & durability
42.2
77.9
43.7
Performance Avg
72.5
28
Quality of Victory
54
45
Momentum Score
100
Vieira
Harrison
Striking
Significant strikes per minute & accuracy
0.9
1.7
41%
Strike Accuracy
70%
1.3
Striking Style Score (/10)
2.0
0 KOs
KO Finishes
0 KOs
Strike targetStrike target
3
Head
19
1
Body
1
1
Leg
3
RangeRange
5Distance6
0Clinch0
0Ground17
Vieira
Harrison
Grappling
Takedowns, submissions & wrestling
3.0
/ 10
6.1
/ 10
2.1
Wrestling Style (/10)
4.3
1.0
Submission Style (/10)
6.7
1
Submission wins
2
Per-fight takedown stats will populate after live card results are scraped
Vieira
Harrison
Durability / Chin
Resilience against knockouts and stoppages
70
100
Moderate
Verdict
Never stopped
1
KO/TKO Losses
0
0
Sub Losses
0
Avg R1.0 stoppage
KO round context
—
10 fights ago
Last KO loss
—
—
Strikes absorbed / min
—
15/21 fights
Chin rating based on
3/20 fights
Vieira
Harrison
Form & Momentum
Recent fight performance — most recent weighted 30%
45
100
Current form
3-fight 🔥 win streak
W · Dec · R3
L · Dec · R3
W · Dec · R3
L · Dec · R3
W · Dec · R3
Last 5
W · Sub · R2
W · Dec · R3
W · Sub · R2
Vieira
Harrison
Finish Rate
Percentage of wins by KO/TKO or Submission
10%
67%
0
KO / TKO Wins
0
1
Submission Wins
2
9
Decision Wins
1

Style Fingerprint

Combatrics radar — 6 fighting dimensions scored 0–10

Vieira
Harrison
Striking1.3 / 2.0Volume8.5 / 4.7Grappling3.0 / 6.1Wrestling2.1 / 4.3Submission1.0 / 6.7Pressure2.7 / 7.7
Fighter 1
Fighter 2
1.3
Striking
KO power & stand-up volume
2.0
3.0
Grappling
Ground control & clinch
6.1
2.1
Wrestling
Takedown threat & defence
4.3
1.0
Submission
Submission attack frequency
6.7
2.7
Pressure
Clinch/ground work rate
7.7
8.5
Volume
Decision-pace fighting
4.7
Vieira
Strike Zones
Harrison
Vieira
Attacking
3HEAD1BODY1LEGS5 landed
Absorbing
19HEAD1BODY3LEGS23 absorbed
Harrison
Attacking
19HEAD1BODY3LEGS23 landed
Absorbing
3HEAD1BODY1LEGS5 absorbed
Targeting Overlap
🎯Vieira targets the head (60% of attacks) — Harrison absorbs 60% of strikes there
🎯Harrison targets the head (83% of attacks) — Vieira absorbs 83% of strikes there

Round by Round

This fight · per-round breakdown

Vieira
RND
Harrison
0/0R00/0

Vieira · QOF Timeline

Avg: 5.1
0104.5W4.5W5.2W4.5W2.3L4.5W5.6L5.4W4.6W6.1L4.5W7.6L5.8W6.0L5.4W2016-102019-122022-052025-052026-05
WinLossTrend

Harrison · QOF Timeline

Avg: 5.7
0105.4W4.9W6.7W2024-042024-102025-06
WinLossTrend

Vieira · Last 5

W · Dec · R3
Jacqueline CavalcantiRating 5.4
Decision
UFC Fight Night: Allen vs. Costa · 2026-05
L · Dec · R3
Norma DumontRating 6
Decision
UFC Fight Night: Garcia vs. Onama · 2025-11
W · Dec · R3
Macy ChiassonRating 5.8
Decision
UFC Fight Night: Blanchfield vs. Barber · 2025-05
L · Dec · R3
Kayla HarrisonRating 7.6
Decision
UFC 307: Pereira vs. Rountree Jr. · 2024-10
W · Dec · R3
Pannie KianzadRating 4.5
Decision
UFC Fight Night: Aspinall vs. Tybura · 2023-07

Harrison · Last 3

W · Sub · R2
Julianna PenaRating 6.7
Submission
UFC 316: Dvalishvili vs. O'Malley 2 · 2025-06
W · Dec · R3
Ketlen VieiraRating 4.9
Decision
UFC 307: Pereira vs. Rountree Jr. · 2024-10
W · Sub · R2
Holly HolmRating 5.4
Submission
UFC 300: Pereira vs. Hill · 2024-04

News & Media

Ketlen Vieira · Kayla Harrison
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