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UFC 75: Champion vs Champion
Dennis Siver
Dennis Siver
10-4 · DEU
VS
Naoyuki Kotani
Naoyuki Kotani
17-6-5 · JPN
September 8, 2007 · London, England, United Kingdom
Lightweight · 3 rounds
154.0lb
Weigh-in
155.0lb
Dennis Siver def. Naoyuki Kotani by KO/TKO (Punch), R2 2:04
Performance
Round by round
SSTDKDCtrl
R1
Siver17/360/003:46
Kotani3/60/000:05
R2 · 2:04
Siver11/300/210:03
Kotani6/240/000:00
Total
Siver28/660/213:49
Kotani9/300/000:05

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
SiverWin probabilityKotani
52.0%48.0%
KO / TKO
31%
Submission
17%
Decision
52%
Expected fight time: 10.7 min
What drives the pick

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

Predicted outcomes
Siver52%
Wins by
Model
Equity
Mkt
KO / TKO18%35%
Submission5%10%
Decision29%55%
Predicted output
Sig. strikes46 (2659)act 28
Takedowns0.4 (0.01.6)act 0
Kotani48%
Wins by
Model
Equity
Mkt
KO / TKO13%26%
Submission12%25%
Decision23%49%
Predicted output
Sig. strikes29 (1638)act 9
Takedowns0.5 (0.01.9)act 0
Combined totals~75 sig strikes~0.8 takedownsmkt —
How it ends
mkt —
R123%
R216%
R39%
Distance52%
Fighter props
Most sig. strikestie 1.3%
Siver
68.7%-229
Kotani
+22930.0%
Most takedownstie 48.8%
Siver
21.4%+139
Kotani
-13929.8%
Significant strikes — over/under
Siver
Expected: 45.6
45.5
Over 45.5
42.6%
+134
Under 45.5
57.4%
-134
058115
Kotani
Expected: 29.4
29.5
Over 29.5
42.2%
+137
Under 29.5
57.8%
-137
03774
Takedowns — over/under
Siver
Expected: 0.4
0.5
Over 0.5
28.5%
+251
Under 0.5
71.5%
-251
035
Kotani
Expected: 0.5
0.5
Over 0.5
36.8%
+172
Under 0.5
63.2%
-172
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 10.7 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
Siver52.0%35.8%+16.2+165
Kotani48.0%64.2%−16.2-210

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
77.6Striking48.5
Siver +29.1
50.0Grappling49.5
Siver +0.5
Str/minStr accStr defAbsorbedTD/15TD accTD defSubs
Hover a point to see the values
SiverKotani
Tale of the tape
Ratings (Elo)
1500
Pound-for-pound
1499
1517
Divisional
1499
1498
Striking offense
1495
1534
Striking defense
1507
1488
Grappling offense
1501
1493
Grappling defense
1497
Physical
28 yrs
Age
25 yrs
5'6"
Height
5'8"
70"
Reach
66"
Orthodox
Stance
Southpaw
Striking (UFC career)
1.48
Strikes landed / min
0.80
67%
Strike accuracy
40%
0.74
Strikes absorbed / min
1.40
80%
Strike defense
25%
Grappling (UFC career)
11.11
Takedowns / 15 min
1.00
100%
Takedown accuracy
50%
Takedown defense
33%
0.0
Sub attempts / 15 min
1.0
Form & résumé
0%
UFC win rate
0%
-1
Win/loss streak
-1
0%
Last-5 win rate
0%
Finish rate
Recent opp. quality
140
Days since last fight
156
Recent form (last 5 UFC)
Dennis Siver
  • LJess LiaudinSUB R1
    Close -1355mo before
Naoyuki Kotani
  • LThiago TavaresU-DEC R3
    Close +2455mo before
Siver — win / loss by method
Record: 10-4-0

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
4 wins, 0 losses
W
40% of wins
L
0% of losses
Submission
4 wins, 4 losses
W
40% of wins
L
100% of losses
Decision
2 wins, 0 losses
W
20% of wins
L
0% of losses
UFC
0win1loss0draw0NC
WinsLosses
0 ()KO/TKO(0%) 0
0 ()Submission(100%) 1
0 ()Decision(0%) 0
Non-UFC
10win3loss0draw0NC
WinsLosses
4 (40%)KO/TKO(0%) 0
4 (40%)Submission(100%) 3
2 (20%)Decision(0%) 0
Kotani — win / loss by method
Record: 17-6-5

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
2 wins, 4 losses
W
12% of wins
L
67% of losses
Submission
14 wins, 0 losses
W
82% of wins
L
0% of losses
Decision
1 win, 2 losses
W
6% of wins
L
33% of losses
UFC
0win1loss0draw0NC
WinsLosses
0 ()KO/TKO(0%) 0
0 ()Submission(0%) 0
0 ()Decision(100%) 1
Non-UFC
17win5loss5draw0NC
WinsLosses
2 (12%)KO/TKO(80%) 4
14 (82%)Submission(0%) 0
1 (6%)Decision(20%) 1

Profiles

Experience
Siver
Kotani
1
UFC fights
1
1.4 min · 1.4 avg
Octagon time
15.0 min · 15.0 avg
22y 5m
Career length
25y 11m
UFC schedule strength

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

Siver
Kotani
12W–8L · 60.0%
Overall
10W–0L · 100.0%
0W–0L
Wins
0W–0L
12W–8L · 60.0%
Losses
10W–0L · 100.0%
Non-UFC schedule strength
Siver
Kotani
85W–42L · 66.9%
Overall
133W–63L · 67.9%
61W–37L · 62.2%
Wins
66W–42L · 61.1%
24W–5L · 82.8%
Losses
67W–21L · 76.1%
Distance striking
Siver
Kotani
3.16
Landed / min
2.20
66.7%
Accuracy
36.4%
80.0%
Defense
54.5%
0.00
Knockdowns / 15 min
0.00
46.9%
Time at distance
24.3%
Grappling & control
Siver
Kotani
11.11
Takedowns / 15 min
1.00
100.0%
Takedown accuracy
50.0%
Takedown defense
33.3%
0.00
Sub attempts / 15 min
1.00
0.0%
Control share
53.4%
Strike target map
Siver
  • Head0%(0)div 66%
  • Body100%(2)div 20%
  • Legs0%(0)div 14%
Kotani
  • Head25%(3)div 66%
  • Body8%(1)div 20%
  • Legs67%(8)div 14%

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

Dennis Siver
CloseSSTDKDCtrl

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

Naoyuki Kotani
CloseSSTDKDCtrl

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