Adrian Bartosinski puts his welterweight title on the line against Tymoteusz Lopaczyk on November 21 in Szczecin, Poland. KSW 123 features nine confirmed bouts, prelims included.
Date, venue and start times
KSW 123 takes place on Saturday, November 21, 2026, at ENEA Arena in Szczecin, Poland. Prelims start at noon Eastern, with the main card at 2 p.m. Eastern.
| Card segment | US Eastern | US Central | US Mountain | US Pacific | United Kingdom | Central Europe |
|---|---|---|---|---|---|---|
| Prelims | 12:00 PM | 11:00 AM | 10:00 AM | 9:00 AM | 5:00 PM | 6:00 PM |
| Main card | 2:00 PM | 1:00 PM | 12:00 PM | 11:00 AM | 7:00 PM | 8:00 PM |
How to Watch
KSW sells the card worldwide, pay-per-view, on its own KSW TV app. No US broadcaster is confirmed for this specific event at the time of writing. In Poland itself, the card also streams on Canal+.
| Country | Broadcaster | Segments | Access |
|---|---|---|---|
| United States | KSW TV | Full card | Paid, pay-per-view |
| Canada | Not confirmed | - | Broadcaster not confirmed as of 11/12/2026 |
| United Kingdom and Ireland | Not confirmed | - | Broadcaster not confirmed as of 11/12/2026 |
| France | RMC Sport | Full card | Paid subscription (as of 11/09/2026 pricing check) |
| Switzerland | Not confirmed | - | Broadcaster not confirmed as of 11/12/2026 |
| Germany and Austria | Not confirmed | - | Broadcaster not confirmed as of 11/12/2026 |
| Worldwide platform | KSW TV | Full card | Paid, pay-per-view |
RMC Sport has held exclusive French rights to KSW since a deal announced in February 2023, and it was still airing KSW cards, including KSW 122, in October 2026. That deal originally covered twelve KSW events a year for French subscribers.
Main card
The main event pits Adrian Bartosinski (19-1-0) against Tymoteusz Lopaczyk (14-4-0) for the welterweight title, scheduled for five rounds. The co-main event is a lightweight bout between Moldova’s Valeriu Mircea (32-9-1) and Marcin Held (31-11-0), also set for five rounds.
The rest of the main card pairs Tomasz Romanowski (19-12-0, 1 NC) with Igor Michaliszyn (12-4-0) at middleweight, Latvia’s Madars Fleminas (14-8-0) with Mateusz Pawlik (7-3-0) at welterweight, and Kamil Szkaradek (7-1-0) with Brazil’s Rogerio Bontorin (17-6-0, 2 NC) at bantamweight. Oskar Szczepaniak (7-3-0) meets Michal Hir (5-1-0) at a 174-pound catchweight, and Wojciech Kawa (9-5-0) closes the main card against Ukraine’s Oleksandr Moisa (5-2-0) at lightweight. Aside from Mircea, Bontorin and Moisa, every other fighter named here is Polish.
| Fight | Weight class | Stakes |
|---|---|---|
| Adrian Bartosinski vs Tymoteusz Lopaczyk | Welterweight (170 lbs / 77 kg) | KSW title, 5 rounds |
| Valeriu Mircea vs Marcin Held | Lightweight (155 lbs / 70 kg) | 5 rounds |
| Tomasz Romanowski vs Igor Michaliszyn | Middleweight (185 lbs / 84 kg) | - |
| Madars Fleminas vs Mateusz Pawlik | Welterweight (170 lbs / 77 kg) | - |
| Kamil Szkaradek vs Rogerio Bontorin | Bantamweight (135 lbs / 61 kg) | - |
| Oskar Szczepaniak vs Michal Hir | Catchweight (174 lbs / 79 kg) | - |
| Wojciech Kawa vs Oleksandr Moisa | Lightweight (155 lbs / 70 kg) | - |
Prelims
Two bouts open the card: Belgium’s Alain Van De Merckt (10-2-0) against Szymon Herrmann (7-0-0) at middleweight, and Maciej Kazieczko (9-5-0) against Bohdan Danylko (8-1-0) at lightweight.
| Fight | Weight class |
|---|---|
| Alain Van De Merckt vs Szymon Herrmann | Middleweight (185 lbs / 84 kg) |
| Maciej Kazieczko vs Bohdan Danylko | Lightweight (155 lbs / 70 kg) |
What is at stake
Adrian Bartosinski defends the welterweight belt against Tymoteusz Lopaczyk in the five-round format KSW reserves for its championship bouts. The co-main event between Valeriu Mircea and Marcin Held is also scheduled for five rounds.
Two bouts on the card changed opponents after their original announcement: Kamil Szkaradek was first set to face Bruno Azevedo before moving to Rogerio Bontorin, while Artur Szczepaniak was pulled from bouts with Michal Hir and then Steven Krt before that Krt matchup was cancelled outright. Oskar Szczepaniak now faces Michal Hir instead. The reshuffling leaves the catchweight bout as the only one on the main card without a weight class of its own.
Outside Poland and France, KSW TV’s pay-per-view app remains the only confirmed way to watch the full card at this time, including for American and Canadian fight fans looking to stream the event live.
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