Have Kostya Tszyu and Leonardo Mas ever fought each other?

Yes. Kostya Tszyu and Leonardo Mas met once on January 18, 1997, and the bout produced no decision by TD in round 1.

Who has the better record, Tszyu or Mas?

Kostya Tszyu is 31-2 and Leonardo Mas is 1-1 across the 3 bouts Kill The Body has tracked. Kostya Tszyu has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.

Who has more knockouts, Tszyu or Mas?

Kostya Tszyu has 25 knockout wins and Leonardo Mas has 0. Kostya Tszyu has more.

Do Tszyu and Mas have any common opponents?

Kostya Tszyu and Leonardo Mas share 1 common opponent: Diosbelys Hurtado. Kostya Tszyu fared better against 1 of them.

Who is bigger, Tszyu or Mas?

Kostya Tszyu is the taller fighter at 170 cm, 1 cm above the other.

How much fight data does Kill The Body have on Tszyu and Mas?

This comparison is drawn from 34 bouts tracked for Kostya Tszyu and 3 bouts tracked for Leonardo Mas. Method and activity splits reflect those bouts only.

Kostya Tszyu vs Leonardo Mas — Records, Stats & Common Opponents

🇷🇺SUPER LIGHTWEIGHT

Kostya Tszyu

🇺🇸UNITED STATES

Leonardo Mas

Kostya Tszyu (31-2) and Leonardo Mas (1-1 across 3 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.

Tszyu

Wins25 KO · 81%

Losses

Draws34 tracked bouts

Mas

Tracked record

1–1

counted from 3 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

1 meeting, no decision

Kostya Tszyu and Leonardo Mas have met 1 time; 1 meeting, no decision.
Met	1997Jan 18	Series
Kostya TszyuFighter A	NCNo decision	0–0W–L
Leonardo MasFighter B	NCNo decision	0–0W–L
Result	TDR1Tszyu vs Mas	1Meeting

Tszyu vs Mas · Jan 18, 1997

The Numbers

Tszyu 5 · Mas 2 of 7 measurable rows

TszyuEdge = longer wingMas

Record^†: 31-2 (edge)1-1
Win %0–100%: 93.9% (edge)
50%
Wins by knockoutmax 25: 25 (edge)
0
KO ratenot comparable: 80.65%—
Stoppage rate (tracked wins)^‡0–100%: 81%
100% (edge)
Times stopped^‡max 2: 2
1 (edge)
Title reignsmax 6: 6 (edge)
0
Bouts per year^§max 2.6: 2.6 (edge)
0.8
Bouts trackedcoveragemax 34: 34
3

† 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

HeightLevel: Kostya Tszyu: 5′7″; Leonardo Mas: 5′7″
Reachnot held: Kostya Tszyu: 67″; Leonardo Mas: No reach on file
Age3 yrs apart: Kostya Tszyu: 57; Leonardo Mas: 54
Stance: Kostya Tszyu: Orthodox; Leonardo Mas: Not recorded

Kostya Tszyu left, Leonardo Mas right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only

Kostya Tszyu31 wins · from 34 tracked bouts

25 by KO/TKO 81%6 on the cards 19%

Leonardo Mas1 win · from 3 tracked bouts

1 by KO/TKO 100%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Kostya Tszyu 34, Leonardo Mas 3 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · Tszyu better on 11 shared · Kostya Tszyu better on 1

TszyuKostya Tszyu

Opponent

MasLeonardo Mas

Kostya Tszyu
Win, TKO 5
1998Nov 1998
HurtadoDiosbelys HurtadoCuba 43–3–1Tszyu betterKostya Tszyu better — 1–0 to 0–1
Leonardo Mas
Loss, TKO 3
1998Jun 1998

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

Kostya Tszyu last boxed on Jun 4, 2005 — 7,810 days ago. Tszyu had won four in a row before losing by stoppage to Ricky Hatton.WWWWL

Judah Nov 2001Tackie May 2002Leija Jan 2003Mitchell Nov 2004Hatton Jun 20052.6 tracked bouts per year

Leonardo Mas last boxed on Jun 7, 1998 — 10,364 days ago. Mas had lost the most recent, to Diosbelys Hurtado.WNCL

Pintor Aug 1994Tszyu Jan 1997Hurtado Jun 19980.8 tracked bouts per year

Common Questions

With the rows behind them

Have Kostya Tszyu and Leonardo Mas ever fought each other?: Yes. Kostya Tszyu and Leonardo Mas met once on January 18, 1997, and the bout produced no decision by TD in round 1.
Who has the better record, Tszyu or Mas?: Kostya Tszyu is 31-2 and Leonardo Mas is 1-1 across the 3 bouts Kill The Body has tracked. Kostya Tszyu has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Who has more knockouts, Tszyu or Mas?: Kostya Tszyu has 25 knockout wins and Leonardo Mas has 0. Kostya Tszyu has more.
Do Tszyu and Mas have any common opponents?: Kostya Tszyu and Leonardo Mas share 1 common opponent: Diosbelys Hurtado. Kostya Tszyu fared better against 1 of them.
Who is bigger, Tszyu or Mas?: Kostya Tszyu is the taller fighter at 170 cm, 1 cm above the other.
How much fight data does Kill The Body have on Tszyu and Mas?: This comparison is drawn from 34 bouts tracked for Kostya Tszyu and 3 bouts tracked for Leonardo Mas. Method and activity splits reflect those bouts only.

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Kostya Tszyu vs Leonardo Mas — record, stats and common opponents compared

Kostya Tszyu

Leonardo Mas