Have Kamil Szeremeta and Ruben Diaz ever fought each other?

Yes. Kamil Szeremeta and Ruben Diaz met once on September 22, 2018, and Kamil Szeremeta won by KO in round 10.

Who has the better record, Szeremeta or Diaz?

Kamil Szeremeta is 26-3-2 and Ruben Diaz is 1-4-1 across the 6 bouts Kill The Body has tracked. Kamil Szeremeta has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.

Who has more knockouts, Szeremeta or Diaz?

Kamil Szeremeta has 9 knockout wins and Ruben Diaz has 0. Kamil Szeremeta has more.

Do Szeremeta and Diaz have any common opponents?

Kamil Szeremeta and Ruben Diaz share 1 common opponent: Rafał Jackiewicz. Neither fighter fared better across the shared opponents overall.

How much fight data does Kill The Body have on Szeremeta and Diaz?

This comparison is drawn from 31 bouts tracked for Kamil Szeremeta and 6 bouts tracked for Ruben Diaz. Method and activity splits reflect those bouts only.

Kamil Szeremeta vs Ruben Diaz — Records, Stats & Common Opponents

🇵🇱MIDDLEWEIGHT

Kamil Szeremeta

Ruben Diaz

Kamil Szeremeta (26-3-2) and Ruben Diaz (1-4-1 across 6 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Szeremeta

Wins9 KO · 35%

Losses

Draws31 tracked bouts

Diaz

Tracked record

1–4–1

counted from 6 bouts Kill The Body has ingested

Heads up: at least one of these records is a tracked record — the wins and losses Kill The Body has ingested so far, not an independently verified career total. Treat the comparison as a read on the bouts we hold, not a settled ledger.

Head to Head

Szeremeta leads 1–0

Kamil Szeremeta and Ruben Diaz have met 1 time; Szeremeta leads 1–0.
Met	2018Sep 22	Series
Kamil SzeremetaFighter A	WWon	1–0W–L
Ruben DiazFighter B	LLost	0–1W–L
Result	KOR10Szeremeta vs Diaz	1Meeting

Szeremeta vs Diaz · Sep 22, 2018

The Numbers

Szeremeta 6 · Diaz 1 of 7 measurable rows

SzeremetaEdge = longer wingDiaz

Record^†: 26-3-2 (edge)1-4-1
Win %0–100%: 87.1% (edge)
25%
Wins by knockoutmax 9: 9 (edge)
0
KO ratenot comparable: 34.62%—
Stoppage rate (tracked wins)^‡0–100%: 35% (edge)
0%
Times stopped^‡max 3: 3
1 (edge)
Title reignsmax 1: 1 (edge)
0
Bouts per year^§max 2.4: 2.4 (edge)
0.3
Bouts trackedcoveragemax 31: 31
6

† One or both records are tracked, not career-verified. · ‡ Counted from bouts Kill The Body has ingested, not a career total. · § Across each fighter's tracked career span. · Bars are scaled per row — percentages on 0–100, counts against the larger of the two. Every figure is also printed as text.

Tale of the Tape

Heightnot held: Kamil Szeremeta: 5′10″; Ruben Diaz: No height on file
Agenot held: Kamil Szeremeta: 37; Ruben Diaz: No date of birth
Stance: Kamil Szeremeta: Orthodox; Ruben Diaz: Not recorded

Kamil Szeremeta left, Ruben Diaz right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only

Kamil Szeremeta26 wins · from 31 tracked bouts

9 by KO/TKO 35%17 on the cards 65%

Ruben Diaz1 win · from 6 tracked bouts

1 on the cards 100%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Kamil Szeremeta 31, Ruben Diaz 6 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · even on 11 shared · even on 1

SzeremetaKamil Szeremeta

Opponent

DiazRuben Diaz

Kamil Szeremeta
Win, UD
2015Apr 2015
JackiewiczRafał JackiewiczPoland 51–30–3EvenEven — 1–0 both
Ruben Diaz
Win, UD
2017Nov 2017

Both sides are set at the same size on purpose. Kill The Body does not score a second-round knockout above a split decision — the edge counts losses first and wins as the tiebreak, and the rest is yours to argue. Shared opponents are matched on fighter identity, not on name, so two different fighters with the same name never merge into one row.

Current Form

Oldest left · newest right

Kamil Szeremeta has won once since two bouts without a win. Szeremeta last boxed on Oct 4, 2025 — 384 days ago.WWDLW

Rodriguez Nov 2023Trimech Nov 2023Mina Feb 2024Jr Oct 2024Nedbal Oct 20252.4 tracked bouts per year

Ruben Diaz last boxed on Sep 22, 2018 — 2,953 days ago. Diaz had won one in a row before losing by stoppage to Kamil Szeremeta.LLDWL

Pérez Mar 2000Rojas Sep 2000Jantuah Nov 2007Jackiewicz Nov 2017Szeremeta Sep 20180.3 tracked bouts per year

Common Questions

With the rows behind them

Have Kamil Szeremeta and Ruben Diaz ever fought each other?: Yes. Kamil Szeremeta and Ruben Diaz met once on September 22, 2018, and Kamil Szeremeta won by KO in round 10.
Who has the better record, Szeremeta or Diaz?: Kamil Szeremeta is 26-3-2 and Ruben Diaz is 1-4-1 across the 6 bouts Kill The Body has tracked. Kamil Szeremeta has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Who has more knockouts, Szeremeta or Diaz?: Kamil Szeremeta has 9 knockout wins and Ruben Diaz has 0. Kamil Szeremeta has more.
Do Szeremeta and Diaz have any common opponents?: Kamil Szeremeta and Ruben Diaz share 1 common opponent: Rafał Jackiewicz. Neither fighter fared better across the shared opponents overall.
How much fight data does Kill The Body have on Szeremeta and Diaz?: This comparison is drawn from 31 bouts tracked for Kamil Szeremeta and 6 bouts tracked for Ruben Diaz. Method and activity splits reflect those bouts only.

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Kamil Szeremeta vs Ruben Diaz — record, stats and common opponents compared

Kamil Szeremeta

Ruben Diaz