Allen vs Costa

The key to the fight

THE PARADOX

The Guy In A Slump Has Never Been Finished. The Guy On Fire Has Never Been Tested.

Arnold Allen has lost 3 of his last 4 (Holloway April 2023, Evloev January 2024, Jean Silva January 2026), and the public read is that the former contender is fading. That read needs context.

All four career losses came by decision — nobody has finished Allen in 24 pro fights — and the men who beat him are Max Holloway (former champ), Movsar Evloev (undefeated, top 5), and Jean Silva (who broke out in 2025 and slid into the top 8). It isn't decline; it's opponent calibre.

The Chikadze decision win (July 2024) still counts as a UD over a top-10 fighter.

On the other side, Melquizael Costa is the cleanest rise at 145: six straight wins, four finishes in the run (Fili by guillotine R1, Charriere by head kick at 1:14, Dan Ige by the 6th spinning-back-kick KO in UFC history), MMA Junkie's 2025 Under-the-Radar Fighter of the Year.

But the longest fight Costa has had in the UFC is the UD over Erosa (15 minutes) and over Christian Rodriguez (15 minutes). He has never gone past three rounds. Allen has five 25-minute fights on the record, including a full 25 with Holloway and three rounds with Evloev where he was being controlled.

The question for this main event isn't technical — it's structural: can Costa cash the technical edge before the experience gap shows up in championship rounds?

Tale of the Tape

Current form

Level of competition

No direct common opponents. The calibre comparison IS the story: Allen is 1W-3L against the top 5 (KO win over Kattar; losses to Holloway, Evloev, Silva) and has beaten Chikadze (top 10) and Hooker (top 10). Costa has never faced a top-10 ranked opponent.

Dan Ige is #27, Charriere is unranked, Fili and Erosa are unranked veterans. The six wins in the streak combine for ZERO top-15 opponents. That doesn't invalidate Costa's rise, but it does mark the calibre jump this fight represents.

Real calibre gap — Allen has three 25-minute fights at the elite level (Holloway full distance) on file; Costa has never been past 15 minutes in the UFC.

Stats

How they win and lose

Both profiles balanced. Allen wins more on the cards (45% of his wins) and has secondary power (7 KOs). Costa has more total finishes (17 between KO and sub, vs Allen's 11) but also 35% decisions. The difference is that Costa's current streak (Fili, Charriere, Ige, plus Nuerdanbieke) is four finishes — peak offensive form. Allen has gone four straight decisions.

The structurally biggest stat in the fight. Allen has 4 career losses — ALL by decision. Has NEVER been knocked out, NEVER been submitted in 24 pro fights. Across 11 UFC fights against top-5 and top-10 calibre, nobody has stopped him. Costa's loss profile is spread: 2 KOs, 2 subs, 3 decisions.

The two UFC subs came in his short-notice debut moving up to lightweight (Moises face crank, Jan 2023), and the KO loss to Garcia (Dec 2023) was also a weight class up. But the chin resume isn't elite. For method bets: Costa by KO over Allen is statistically uphill.

Costa by takedown-to-sub is uphill too (72% Allen TDD). Decision is the lane where Allen's resume opens up.

Skills

• 1. Striking VolumeEdge: Costa (2/5)

  Costa 4.38 SLpM vs Allen's 3.47. Costa produces 26% more raw volume.

• 2. Precision and Distance StrikingEdge: Allen (1/5)

  Allen is the more technical southpaw — movement and distance management. Costa is more aggressive, more willing to trade.

• 3. Knockout PowerEdge: Costa (3/5)

  Costa has 9 KOs in 26 wins (35%), four KO/TKOs in the current run. Allen has 7 KOs in 20 wins but none in his last five outings.

• 4. Wrestling and Takedown DefenseEdge: Allen (3/5)

  Allen 72% TDD vs Costa 59% TDD. Costa shoots more (2.0/15min) but is more vulnerable.

• 5. Durability (Chin + Sub Defense)Edge: Allen (4/5)

  Allen has NEVER been finished in 24 pro fights. Costa has been submitted twice and KO'd twice in his career. Structural gap.

• 6. Cardio Over 5 RoundsEdge: Allen (3/5)

  Allen went 25 with Holloway and the full distance with Evloev. Costa has never been past 15 minutes in the UFC. Uncharted for Costa.

Costa has the technical edge in the first 15 minutes (volume, power, aggression). Allen has the structural edge after that (TDD, elite chin, cardio proven over 25). The fight is a race between Costa finishing early or Allen imposing his fight late.

Full prediction

The thesis

The thesis is: Arnold Allen wins by decision because, first, he has 72% TDD vs Costa's 59% (13-point gap), 60% striking defense vs 55%, and southpaw distance management trained at Tristar with Firas Zahabi.

Second, his chin is structurally elite — NEVER finished in 24 pro fights, ZERO KO losses in 4 decision losses — which neutralizes Costa's main weapon (16 finishes in 26 wins, 6 of his last 7 wins by finish).

Third, the calibre is genuinely different: Allen lost to Holloway, Evloev, Silva (all top 8); Costa beat Ige (#27), Charriere (outside top 30), Erosa (unranked) in his streak.

Path: Allen absorbs Costa's opening pace through rounds 1-2, neutralizes the takedown attempts, opens distance with the straight left and low kick (his signature), and dictates volume through rounds 3-5 where cardio and 25-minute experience matter.

Falls apart if Costa stacks a kick sequence in the first 15 minutes the way he did to Dan Ige (spinning back kick) or Charriere (body kick → head kick).

Conviction 6 (not 7) because the thesis has four convergent dimensions (stats, calibre, experience, durability) but three factors cap the ceiling. First, Allen has lost 3 of his last 4 — that statistically opens the floor for Costa even if opponent calibre explains most of the slide.

Second, Costa brings real finishing power right now (4 finishes in the last 6 wins), and when a fighter is peaking offensively, any chin can crack. Third, the market opened Allen and sits 63/37 — implied probability for is 65%, estimated 60% — the moneyline edge isn't huge.

The Tier-1 calibre ressalva fires in the opposite direction here: the predicted winner (Allen) IS the higher-calibre fighter; the underdog (Costa) is the one who hasn't faced top-10 competition. That doesn't flip the thesis — but it keeps conviction at medium because Costa's resume is genuinely thin at this level.

What breaks the thesis

1. Costa lands the spinning back kick or head kick in rounds 1-2 (Chute Boxe specialty, Ige/Charriere pattern)
2. Allen can't neutralize Costa's volume in the first 15 minutes and absorbs accumulated damage
3. Costa forces clinch + takedown in a transition and opens top control using his Muay Thai discipline
4. Costa's cardio holds up at 25 minutes for the first time and Allen doesn't have the volume to take the late rounds

The underdog's path

Costa has two parallel paths. Path A (finish in the first 15 minutes): walk Allen down at center cage, vary the kicks (body, low, head) the way he did to Charriere (body kick → head kick at 1:14 of R1), find the finishing sequence, close before round 4. The spinning back kick on Dan Ige is the power resume for this path. Path B (volume decision): hold 4.38 SLpM across the 5 rounds, force Allen to eat more, win 3 of 5 rounds on close cards by leaning on the "Allen has lost 3 of 4" narrative. Path B is riskier because Costa has never been past 15 minutes in the UFC — but the 9 career decisions over 26 wins say the professional cardio exists.

• Land meaningful damage in R1 before Allen finds his southpaw rhythm
• Force Allen out of distance management and into stand-up trades
• Keep the aggression without absorbing southpaw low kicks that limit mobility later
• If the fight gets to R4, have the cardio to take at least one of rounds 4-5