Nikita Konstantinovich Tszyu beats Oscar Diaz by TKO in round 6 on 7 May 2026

Nikita Konstantinovich Tszyu stopped Oscar Diaz via sixth-round TKO at the welterweight/" class="internal-link text-bone underline decoration-ash/30 hover:decoration-gold underline-offset-2">super-welterweight contest headlining the Nikita Tszyu vs. Oscar Diaz card. The unbeaten Tszyu extended his record to 13-0 with his first career stoppage win, while Diaz fell to 0-1 in his professional debut.

How it ended

Tszyu forced the stoppage in round six, securing the technical knockout to claim his maiden knockout victory as a professional. The finish marked a breakthrough moment for the previously all-decision winner, who had gone the distance in each of his first dozen outings. Diaz was unable to continue after the sixth frame, handing Tszyu the stoppage he had long sought.

Updated records

• Nikita Konstantinovich Tszyu — 13-0 (1 KO)
• Oscar Diaz — 0-1

What's next

Now 13-0 with one knockout, Tszyu has added a finishing dimension to his previously points-based résumé at welterweight/" class="internal-link text-bone underline decoration-ash/30 hover:decoration-gold underline-offset-2">super-welterweight. The victory keeps his unbeaten run intact as he continues to develop in the 154-pound division. For Diaz, the defeat leaves him 0-1 as he begins his professional journey, with rebuilding the immediate priority after a debut loss.

Frequently asked questions

Who won Nikita Konstantinovich Tszyu vs Oscar Diaz?

Nikita Konstantinovich Tszyu defeated Oscar Diaz by TKO in round 6 at Nikita Tszyu vs. Oscar Diaz.

How did Nikita Konstantinovich Tszyu vs Oscar Diaz end?

The fight ended by TKO in round 6.

What's Nikita Konstantinovich Tszyu's record now?

Nikita Konstantinovich Tszyu now stands at 13-0 (1 KO).

View the full Nikita Tszyu vs. Oscar Diaz card →