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UFC 221: Romero vs. Rockhold
Jussier Formiga
Jussier Formiga
20-5 · BRA
VS
Ben Nguyen
Ben Nguyen
16-6 · USA
February 10, 2018 · Perth, Western Australia, Australia
Flyweight · 3 rounds
Jussier Formiga def. Ben Nguyen by SUB (Rear Naked Choke), R3 1:43
Performance
Round by round
SSTDKDCtrl
R1
Formiga5/91/202:45
Nguyen11/220/000:48
R2
Formiga8/201/201:03
Nguyen9/290/000:07
R3 · 1:43
Formiga14/200/010:14
Nguyen1/140/000:00
Total
Formiga27/492/414:02
Nguyen21/650/000:55

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
FormigaWin probabilityNguyen
57.9%42.1%
KO / TKO
17%
Submission
12%
Decision
71%
Expected fight time: 12.4 min
What drives the pick

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

Predicted outcomes
Formiga58%
Wins by
Model
Equity
Mkt
KO / TKO3%6%
Submission8%13%
Decision47%81%
Predicted output
Sig. strikes35 (2046)act 27
Takedowns1.6 (0.04.0)act 2
Nguyen42%
Wins by
Model
Equity
Mkt
KO / TKO13%32%
Submission5%11%
Decision24%57%
Predicted output
Sig. strikes42 (2354)act 21
Takedowns0.3 (0.01.2)act 0
Combined totals~77 sig strikes~1.9 takedownsmkt —
How it ends
mkt —
R115%
R27%
R37%
Distance71%
Fighter props
Most sig. strikestie 1.4%
Formiga
41.6%+137
Nguyen
-13757.0%
Most takedownstie 26.0%
Formiga
63.9%-634
Nguyen
+63410.1%
Significant strikes — over/under
Formiga
Expected: 35.2
35
Over 35
42.0%
+134
Exactly 35
1.9%
push
Under 35
56.1%
-134
04589
Nguyen
Expected: 41.7
41.5
Over 41.5
42.8%
+134
Under 41.5
57.2%
-134
053105
Takedowns — over/under
Formiga
Expected: 1.6
1.5
Over 1.5
50.7%
-103
Under 1.5
49.3%
+103
035
Nguyen
Expected: 0.3
0.5
Over 0.5
23.0%
+335
Under 0.5
77.0%
-335
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 12.4 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
Formiga57.9%50.0%+7.9-110
Nguyen42.1%50.0%−7.9-110

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
60.2Striking66.9
Nguyen +6.7
57.4Grappling59.7
Nguyen +2.3
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
FormigaNguyen
Tale of the tape
Ratings (Elo)
1576
Pound-for-pound
1555
1574
Divisional
1555
1457
Striking offense
1506
1523
Striking defense
1502
1505
Grappling offense
1509
1519
Grappling defense
1511
Physical
32 yrs
Age
29 yrs
5'5"
Height
5'5"
67"
Reach
65"
Orthodox
Stance
Switch
Striking (UFC career)
1.25
Strikes landed / min
4.54
35%
Strike accuracy
43%
2.23
Strikes absorbed / min
3.66
65%
Strike defense
57%
Grappling (UFC career)
1.77
Takedowns / 15 min
0.45
36%
Takedown accuracy
33%
85%
Takedown defense
71%
0.7
Sub attempts / 15 min
1.8
Form & résumé
60%
UFC win rate
80%
+1
Win/loss streak
+2
60%
Last-5 win rate
80%
33%
Finish rate
75%
Recent opp. quality
141
Days since last fight
245
Recent form (last 5 UFC)
Jussier Formiga
  • WYuta SasakiSUB R1
    Close -4255mo before
  • LRay BorgU-DEC R3
    Close +11011mo before
  • WDustin OrtizU-DEC R3
    Close -2101y 5mo before
  • LHenry CejudoS-DEC R3
    Close +4252y 3mo before
  • WWilson ReisU-DEC R3
    Close -1052y 8mo before
Ben Nguyen
  • WTim ElliottSUB R1
    Close +1608mo before
  • WGeane HerreraU-DEC R3
    Close -1401y 2mo before
  • LLouis SmolkaKO/TKO R2
    Close -1251y 7mo before
  • WRyan BenoitSUB R1
    Close -1302y 3mo before
  • WAlptekin OzkilicKO/TKO R1
    Close +1902y 9mo before
Formiga — win / loss by method
Record: 20-5-0

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
0 wins, 2 losses
W
0% of wins
L
40% of losses
Submission
9 wins, 0 losses
W
45% of wins
L
0% of losses
Decision
11 wins, 3 losses
W
55% of wins
L
60% of losses
UFC
6win4loss0draw0NC
WinsLosses
0 (0%)KO/TKO(50%) 2
2 (33%)Submission(0%) 0
4 (67%)Decision(50%) 2
Non-UFC
14win1loss0draw0NC
WinsLosses
0 (0%)KO/TKO(0%) 0
7 (50%)Submission(0%) 0
7 (50%)Decision(100%) 1
Nguyen — win / loss by method
Record: 16-6-0

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
8 wins, 5 losses
W
50% of wins
L
83% of losses
Submission
5 wins, 1 loss
W
31% of wins
L
17% of losses
Decision
3 wins, 0 losses
W
19% of wins
L
0% of losses
UFC
4win1loss0draw0NC
WinsLosses
1 (25%)KO/TKO(100%) 1
2 (50%)Submission(0%) 0
1 (25%)Decision(0%) 0
Non-UFC
12win5loss0draw0NC
WinsLosses
7 (58%)KO/TKO(80%) 4
3 (25%)Submission(20%) 1
2 (17%)Decision(0%) 0

Profiles

Experience
Formiga
Nguyen
10
UFC fights
5
110.3 min · 11.0 avg
Octagon time
33.1 min · 6.6 avg
21y 2m
Career length
19y 8m
UFC schedule strength

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

Formiga
Nguyen
150W–40L · 78.9%
Overall
50W–16L · 75.8%
100W–30L · 76.9%
Wins
40W–15L · 72.7%
50W–10L · 83.3%
Losses
10W–1L · 90.9%
Non-UFC schedule strength
Formiga
Nguyen
109W–22L · 83.2%
Overall
37W–16L · 69.8%
101W–20L · 83.5%
Wins
28W–13L · 68.3%
8W–2L · 80.0%
Losses
9W–3L · 75.0%
Distance striking
Formiga
Nguyen
1.86
Landed / min
6.80
29.0%
Accuracy
38.7%
77.0%
Defense
77.3%
0.14
Knockdowns / 15 min
1.36
47.2%
Time at distance
53.4%
Grappling & control
Formiga
Nguyen
1.77
Takedowns / 15 min
0.45
36.1%
Takedown accuracy
33.3%
85.2%
Takedown defense
70.6%
0.68
Sub attempts / 15 min
1.81
60.7%
Control share
35.1%
Strike target map
Formiga
  • Head64%(88)div 62%
  • Body21%(29)div 23%
  • Legs15%(21)div 15%
Nguyen
  • Head71%(106)div 62%
  • Body15%(23)div 23%
  • Legs14%(21)div 15%

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

Jussier Formiga
CloseSSTDKDCtrl

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

Ben Nguyen
CloseSSTDKDCtrl

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