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UFC 331HeavyweightPrelimsSep 20, 2026

Tai Tuivasa vs Robelis Despaigne

The AI’s call

Robelis Despaigne68%by KO/TKO · Round 2

Despaigne's reach, accuracy and form edge a fading Tuivasa in a clear but not dominant matchup.

AI vs the market

Tuivasa17%
Despaigne84%
AI

AI 68% · crowd 84% on Despaigne (-15)

15-point gap. Same winner, but the AI backs Tuivasa noticeably harder than the crowd does.

The breakdown

Tai Tuivasa arrives in freefall—seven consecutive losses, including submission defeats to elite grapplers (Volkov, Tybura) and recent decision losses to mid-tier competition. His striking output (3.37/min) remains respectable but accuracy has cratered at 49%, and he absorbs 4.61 sig. strikes per minute, a dangerous ratio at 33. Robelis Despaigne is a 36-year-old Cuban with a 6-2 record who just knocked out Junior dos Santos in May 2026—a statement win. Despaigne's striking is cleaner (60% accuracy, only 2.54 absorbed/min) and he carries a 9-inch reach advantage (84in vs 75in). Both lack grappling threat, but Despaigne's recent form (W1, KO finish) contrasts sharply with Tuivasa's spiral. The age and reach gap favors Despaigne, as does the quality of recent opposition.

Tuivasa — edges

  • Higher striking output (3.37 vs 2.11 sig. strikes/min)
  • More finishing power historically (13 KO/TKOs)
  • Knockdown rate (0.82 vs 0.5 per 15min)

Despaigne — edges

  • 9-inch reach advantage (84in vs 75in)
  • Superior striking accuracy (60% vs 49%)
  • Better striking defense (2.54 absorbed vs 4.61/min)
  • Recent quality win over Junior dos Santos

X-factor

Tuivasa's desperation and power can stun Despaigne early; Despaigne's reach and footwork keep him safe.

How the market sees it ending

How it ends

Goes the full distance27%
Ends by KO / TKO72%
Ends by submission27%

Who lands the knockout

Tuivasa by KO/TKO26%
Despaigne by KO/TKO66%

Tale of the tape

TuivasaDespaigne

Physical

33

Age

36
74"

Height

79"
75"

Reach

84"

Record

14

Wins

6
10

Losses

2
13

Wins by KO/TKO

6
0

Wins by submission

0

Striking

3.37

Landed / min

2.11
4.61

Absorbed / min

2.54
49%

Accuracy

60%
0.82

Knockdowns / 15 min

0.5

Grappling

0

Takedowns / 15 min

0
0%

TD accuracy

0

Sub. attempts / 15 min

0

About these numbers

Market probability is the live crowd consensus from Polymarket, a public prediction market where people trade on outcomes — we read it as a data signal for what the crowd expects, and it updates continuously. AI probabilityis our own model’s independent read of the matchup from fighter data alone; it never sees the market price, which is why the two can disagree.

All of it is published for analysis and entertainment. Nothing here is betting advice, a recommendation, or a prediction of a guaranteed result — fights are volatile and upsets are the sport.