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UFC Fight Night: Hermansson vs. Pyfer
Rodolfo Vieira
Rodolfo Vieira
9-2 · BRA
VS
Armen Petrosyan
Armen Petrosyan
9-2 · ARM
February 10, 2024 · Las Vegas, Nevada, USA
Middleweight · 3 rounds
185.5lb
Weigh-in
186.0lb
Rodolfo Vieira def. Armen Petrosyan by SUB (Arm Triangle), R1 4:48
Performance
Round by round
SSTDKDCtrl
R1 · 4:48
Vieira6/113/302:46
Petrosyan9/200/000:00
Total
Vieira6/113/302:46
Petrosyan9/200/000:00

Pre-fight

The model's read going in

The walk-forward model's call at the time of the bout — persisted out-of-sample, with no hindsight about the result.

Prediction
VieiraWin probabilityPetrosyan
44.8%55.2%
KO / TKO
24%
Submission
20%
Decision
56%
Expected fight time: 10.8 min
Retrospective pick: the walk-forward model's call at the time of the fight — persisted out-of-sample, with no hindsight about the result.
What drives the pick

Each bar is a feature's push on the model from the center axis. Red pushes toward Vieira, blue toward Petrosyan. Tap a bar for why.

Predicted outcomes
Vieira45%
Wins by
Model
Equity
Mkt
KO / TKO8%17%8%
Submission16%37%31%
Decision21%46%13%
Predicted output
Sig. strikes35 (1447)act 6
Takedowns1.6 (0.04.7)act 3
Petrosyan55%
Wins by
Model
Equity
Mkt
KO / TKO16%30%24%
Submission4%6%3%
Decision35%64%21%
Predicted output
Sig. strikes54 (2273)act 9
Takedowns0.4 (0.01.9)act 0
Combined totals~88 sig strikes~2.1 takedownsmkt —
How it ends
mkt —
R125%
R212%
R37%
Distance56%
Fighter props
Most sig. strikestie 1.0%
Vieira
35.2%+181
Petrosyan
-18163.8%
Most takedownstie 27.3%
Vieira
57.8%-386
Petrosyan
+38615.0%
Significant strikes — over/under
Vieira
Expected: 34.6
34.5
Over 34.5
39.9%
+151
Under 34.5
60.1%
-151
04487
Petrosyan
Expected: 53.7
53.5
Over 53.5
40.0%
+150
Under 53.5
60.0%
-150
068135
Takedowns — over/under
Vieira
Expected: 1.6
1.5
Over 1.5
48.4%
+107
Under 1.5
51.6%
-107
035
Petrosyan
Expected: 0.4
0.5
Over 0.5
29.1%
+244
Under 0.5
70.9%
-244
035

Odds are model-implied (no real prop market is priced for these). The “most” prices are draw-no-bet — a tie (for takedowns, usually 0–0) is a push, so each side is priced off its chance of winning given a result, while the % shown is the raw chance of landing strictly more. Drag a line in half-point steps: a half line (e.g. 2.5) is a clean over/under, while a whole number adds a third outcome — landing exactly on it, a push — so over, exact and under sum to 100%. On a whole number the over/under odds are draw-no-bet (priced off the decisive mass, since the push refunds), so the two sides stay mirror images rather than implying an arbitrage.

Expected fight time 10.8 min. Predicted-output ranges are percentiles of the model’s simulated fights: sig strikes the middle 50% (25th–75th); takedowns the wider 10th–90th, since they’re 0 in most fights so a narrow band would collapse to 0. Win-by-method = win probability × that fighter’s own method split: the model forecasts how the fight ends, and that forecast is divided between the corners by each fighter’s finishing record — UFC wins in full, earlier-career wins at half weight, as of fight night — reconciled so the fighters’ totals still equal their win probabilities and the methods still total the fight-level forecast above. “Equity” is each of those over that fighter’s win % — how they win given that they win — so a column adds to 100%, and it differs by corner. A fighter with no classifiable wins at any level leans on the fight-level split. “How it ends” is the model’s round-of-finish split. “Mkt” is the de-vigged market prop (consensus across books), shown for context, not as a betting signal; rounds & totals slots fill as that data lands. Percentages are apportioned by largest remainder, so each set adds to its total exactly and an individual figure can sit a point off its own rounding.

Model vs market
Final
ModelMarketGapLine
To win
Vieira44.8%49.3%−4.5-107
Petrosyan55.2%50.7%+4.5-113
By method
Vieira by KO/TKO10.8%7.7%+3.1+989
Vieira by submission8.9%30.6%−21.7+176
Vieira by decision25.0%13.2%+11.8+540
Petrosyan by KO/TKO13.3%24.5%−11.2+244
Petrosyan by submission11.0%3.5%+7.5+2339
Petrosyan by decision30.8%20.6%+10.2+310
Total rounds (over)
Over 1.5 rds75.3%58.9%+16.4-169
Over 2.5 rds63.0%40.3%+22.7+131
Goes the distance
Fight goes to decision55.8%34.8%+21.0+168

Market % is the de-vigged (no-vig) consensus across the books that price both fighters; the line is the average across books with the min–max range in parentheses. Gap is the model minus the market in points (+ = the model rates that outcome above the market). Thin or one-sided markets are flagged or left blank rather than shown as a fabricated %. Shown for context, not as a bet — the closing line is the sharpest public price and the model trails it on average. For 5-round bouts the model splits its round-3+ finish mass into rounds 3–5 by the historical within-bucket rate, so the over-3.5 / 4.5 lines carry a model estimate.

Trait web
59.3Striking79.0
Petrosyan +19.7
73.1Grappling26.3
Vieira +46.8
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
VieiraPetrosyan
Tale of the tape
Ratings (Elo)
1549
Pound-for-pound
1551
1550
Divisional
1551
1480
Striking offense
1505
1484
Striking defense
1501
1526
Grappling offense
1496
1503
Grappling defense
1527
Physical
34 yrs
Age
33 yrs
6'0"
Height
6'3"
73"
Reach
71"
Orthodox
Stance
Orthodox
Striking (UFC career)
3.36
Strikes landed / min
6.08
55%
Strike accuracy
53%
4.84
Strikes absorbed / min
3.17
49%
Strike defense
57%
Grappling (UFC career)
3.70
Takedowns / 15 min
0.25
26%
Takedown accuracy
33%
100%
Takedown defense
36%
1.4
Sub attempts / 15 min
0.0
Form & résumé
67%
UFC win rate
75%
+1
Win/loss streak
+2
60%
Last-5 win rate
75%
100%
Finish rate
0%
Recent opp. quality
287
Days since last fight
238
Recent form (last 5 UFC)
Rodolfo Vieira
  • WCody BrundageSUB R2
    Close -2429mo before
  • LChris CurtisU-DEC R3
    Close +1011y 8mo before
  • WDustin StoltzfusSUB R3
    Close -2282y 7mo before
  • LAnthony HernandezSUB R2
    Close -5163y before
  • WSaparbeg SafarovSUB R1
    Close -5703y 11mo before
Armen Petrosyan
  • WChristian Leroy DuncanU-DEC R3
    Close +1358mo before
  • WAJ DobsonU-DEC R3
    Close -2131y 4mo before
  • LCaio BorralhoU-DEC R3
    Close +2041y 7mo before
  • WGregory RodriguesS-DEC R3
    Close +1311y 11mo before
Vieira — win / loss by method
Record: 9-2-0

Bar length is fight count (largest bar = full width); shading splits finishes by round and decisions by unanimous vs split — tap a bar for the round-by-round count.

KO/TKO
1 win, 0 losses
W
11% of wins
L
0% of losses
Submission
8 wins, 1 loss
W
89% of wins
L
50% of losses
Decision
0 wins, 1 loss
W
0% of wins
L
50% of losses
UFC
4win2loss0draw0NC
WinsLosses
0 (0%)KO/TKO(0%) 0
4 (100%)Submission(50%) 1
0 (0%)Decision(50%) 1
Non-UFC
5win0loss0draw0NC
WinsLosses
1 (20%)KO/TKO() 0
4 (80%)Submission() 0
0 (0%)Decision() 0
Petrosyan — win / loss by method
Record: 9-2-0

Bar length is fight count (largest bar = full width); shading splits finishes by round and decisions by unanimous vs split — tap a bar for the round-by-round count.

KO/TKO
6 wins, 1 loss
W
67% of wins
L
50% of losses
Submission
0 wins, 0 losses
W
0% of wins
L
0% of losses
Decision
3 wins, 1 loss
W
33% of wins
L
50% of losses
UFC
3win1loss0draw0NC
WinsLosses
0 (0%)KO/TKO(0%) 0
0 (0%)Submission(0%) 0
3 (100%)Decision(100%) 1
Non-UFC
6win1loss0draw0NC
WinsLosses
6 (100%)KO/TKO(100%) 1
0 (0%)Submission(0%) 0
0 (0%)Decision(0%) 0

Profiles

Experience
Vieira
Petrosyan
6
UFC fights
4
52.6 min · 8.8 avg
Octagon time
60.0 min · 15.0 avg
9y 6m
Career length
7y 9m
UFC schedule strength

Opponents' records on fight night — toggle their full cross-promotional record vs UFC bouts only.

Vieira
Petrosyan
76W–18L · 80.9%
Overall
36W–5L · 87.8%
41W–8L · 83.7%
Wins
25W–4L · 86.2%
35W–10L · 77.8%
Losses
11W–1L · 91.7%
Non-UFC schedule strength
Vieira
Petrosyan
19W–7L · 73.1%
Overall
31W–7L · 81.6%
19W–7L · 73.1%
Wins
24W–4L · 85.7%
0W–0L
Losses
7W–3L · 70.0%
Distance striking
Vieira
Petrosyan
5.25
Landed / min
8.10
53.1%
Accuracy
50.7%
51.9%
Defense
57.7%
0.00
Knockdowns / 15 min
0.00
52.5%
Time at distance
67.1%
Grappling & control
Vieira
Petrosyan
3.70
Takedowns / 15 min
0.25
26.0%
Takedown accuracy
33.3%
100.0%
Takedown defense
35.7%
1.42
Sub attempts / 15 min
0.00
86.1%
Control share
25.4%
Strike target map
Vieira
  • Head81%(144)div 63%
  • Body6%(11)div 20%
  • Legs12%(22)div 17%
Petrosyan
  • Head33%(120)div 63%
  • Body25%(91)div 20%
  • Legs42%(154)div 17%

Where each fighter lands significant strikes (career). “div” = the weight-class average.

Rodolfo Vieira
CloseSSTDKDCtrl

Per-fight: SS & TD shown landed/attempted; Close = consensus closing line.

Armen Petrosyan
CloseSSTDKDCtrl

Per-fight: SS & TD shown landed/attempted; Close = consensus closing line.