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UFC Fight Night: Brunson vs. Till
Tom Aspinall
Tom Aspinall
10-2 · GBR
VS
Serghei Spivac
Serghei Spivac
13-2 · MDA
September 4, 2021 · Las Vegas, Nevada, USA
Heavyweight · 3 rounds
Tom Aspinall def. Serghei Spivac by KO/TKO (Elbow), R1 2:30
Performance
Round by round
SSTDKDCtrl
R1 · 2:30
Aspinall16/260/010:03
Spivac0/110/200:00
Total
Aspinall16/260/010:03
Spivac0/110/200:00

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
AspinallWin probabilitySpivac
57.0%43.0%
KO / TKO
50%
Submission
13%
Decision
37%
Expected fight time: 9.0 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 Aspinall, blue toward Spivac. Tap a bar for why.

Predicted outcomes
Aspinall57%
Wins by
Model
Equity
Mkt
KO / TKO33%58%
Submission6%11%
Decision18%31%
Predicted output
Sig. strikes35 (1447)act 16
Takedowns1.2 (0.03.8)act 0
Spivac43%
Wins by
Model
Equity
Mkt
KO / TKO17%38%
Submission7%17%
Decision19%45%
Predicted output
Sig. strikes30 (1240)act 0
Takedowns0.7 (0.02.8)act 0
Combined totals~64 sig strikes~1.9 takedownsmkt —
How it ends
mkt —
R137%
R215%
R311%
Distance37%
Fighter props
Most sig. strikestie 1.5%
Aspinall
54.0%-121
Spivac
+12144.6%
Most takedownstie 31.0%
Aspinall
43.7%-172
Spivac
+17225.4%
Significant strikes — over/under
Aspinall
Expected: 34.6
34.5
Over 34.5
39.8%
+151
Under 34.5
60.2%
-151
04487
Spivac
Expected: 29.8
30
Over 30
38.6%
+155
Exactly 30
1.6%
push
Under 30
59.8%
-155
03875
Takedowns — over/under
Aspinall
Expected: 1.2
1
Over 1
38.4%
+112
Exactly 1
18.5%
push
Under 1
43.1%
-112
035
Spivac
Expected: 0.7
0.5
Over 0.5
39.9%
+151
Under 0.5
60.1%
-151
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 9.0 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
Aspinall57.0%67.6%−10.6-240
Spivac43.0%32.4%+10.6+195

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
87.2Striking69.6
Aspinall +17.6
64.8Grappling61.5
Aspinall +3.2
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
AspinallSpivac
Tale of the tape
Ratings (Elo)
1562
Pound-for-pound
1563
1562
Divisional
1563
1509
Striking offense
1501
1503
Striking defense
1488
1548
Grappling offense
1510
1551
Grappling defense
1520
Physical
28 yrs
Age
26 yrs
6'5"
Height
6'3"
78"
Reach
78"
Orthodox
Stance
Orthodox
Striking (UFC career)
7.43
Strikes landed / min
3.85
66%
Strike accuracy
51%
3.06
Strikes absorbed / min
3.10
66%
Strike defense
56%
Grappling (UFC career)
3.54
Takedowns / 15 min
2.83
100%
Takedown accuracy
63%
Takedown defense
70%
1.8
Sub attempts / 15 min
0.2
Form & résumé
100%
UFC win rate
67%
+3
Win/loss streak
+3
100%
Last-5 win rate
80%
100%
Finish rate
50%
Recent opp. quality
196
Days since last fight
77
Recent form (last 5 UFC)
Tom Aspinall
  • WAndrei ArlovskiSUB R2
    Close -2806mo before
  • WAlan BaudotKO/TKO R1
    Close -56011mo before
  • WJake CollierKO/TKO R1
    Close -2781y 1mo before
Serghei Spivac
  • WAleksei OleinikU-DEC R3
    Close -2653mo before
  • WJared VanderaaKO/TKO R2
    Close -2506mo before
  • WCarlos FelipeM-DEC R3
    Close -1771y 2mo before
  • LMarcin TyburaU-DEC R3
    Close -1201y 6mo before
  • WTai TuivasaSUB R2
    Close +2701y 11mo before
Aspinall — win / loss by method
Record: 10-2-0

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
8 wins, 0 losses
W
80% of wins
L
0% of losses
Submission
2 wins, 1 loss
W
20% of wins
L
50% of losses
Decision
0 wins, 0 losses
W
0% of wins
L
0% of losses
DQ / other
0 wins, 1 loss
W
0% of wins
L
50% of losses
UFC
3win0loss0draw0NC
WinsLosses
2 (67%)KO/TKO() 0
1 (33%)Submission() 0
0 (0%)Decision() 0
Non-UFC
7win2loss0draw0NC
WinsLosses
6 (86%)KO/TKO(0%) 0
1 (14%)Submission(50%) 1
0 (0%)Decision(0%) 0
0 (0%)DQ / other(50%) 1
Spivac — win / loss by method
Record: 13-2-0

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
5 wins, 1 loss
W
38% of wins
L
50% of losses
Submission
6 wins, 0 losses
W
46% of wins
L
0% of losses
Decision
2 wins, 1 loss
W
15% of wins
L
50% of losses
UFC
4win2loss0draw0NC
WinsLosses
1 (25%)KO/TKO(50%) 1
1 (25%)Submission(0%) 0
2 (50%)Decision(50%) 1
Non-UFC
9win0loss0draw0NC
WinsLosses
4 (44%)KO/TKO() 0
5 (56%)Submission() 0
0 (0%)Decision() 0

Profiles

Experience
Aspinall
Spivac
3
UFC fights
6
8.5 min · 2.8 avg
Octagon time
63.6 min · 10.6 avg
11y 7m
Career length
11y 10m
UFC schedule strength

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

Aspinall
Spivac
49W–24L · 67.1%
Overall
116W–35L · 76.8%
49W–24L · 67.1%
Wins
88W–22L · 80.0%
0W–0L
Losses
28W–13L · 68.3%
Non-UFC schedule strength
Aspinall
Spivac
35W–20L · 63.6%
Overall
353W–123L · 74.2%
16W–13L · 55.2%
Wins
353W–123L · 74.2%
19W–7L · 73.1%
Losses
0W–0L
Distance striking
Aspinall
Spivac
7.56
Landed / min
5.10
62.7%
Accuracy
39.0%
67.1%
Defense
60.3%
1.77
Knockdowns / 15 min
0.00
57.7%
Time at distance
42.6%
Grappling & control
Aspinall
Spivac
3.54
Takedowns / 15 min
2.83
100.0%
Takedown accuracy
63.2%
Takedown defense
70.0%
1.77
Sub attempts / 15 min
0.24
100.0%
Control share
65.1%
Strike target map
Aspinall
  • Head70%(44)div 65%
  • Body11%(7)div 19%
  • Legs19%(12)div 16%
Spivac
  • Head96%(235)div 65%
  • Body3%(8)div 19%
  • Legs1%(2)div 16%

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

Tom Aspinall
CloseSSTDKDCtrl

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

Serghei Spivac
CloseSSTDKDCtrl

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