01Main card
WelterweightKSW Welterweight Championship
Adrian BartosińskiCareer profile
VS
Tymoteusz ŁopaczykCareer profile
ScheduledCard subject to change
KSW · UPCOMING EVENT
KSW 123
Partial verified desk: KSW announced Bartosiński’s welterweight-title defense against Łopaczyk after removing the champion’s planned KSW 122 bout with injured Adam Masaev. No additional KSW 123 bouts are implied.
Nov212026
VENUEEnea ArenaSzczecin, Poland
CARD STATUSConfirmed bouts1 source-listed MMA bout
STARTCheck official sourceBroadcast schedules can change
TITLE FIGHTS1Marked with the Fight Atlas belt
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CONFIRMED FIGHTS
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OFFICIAL ATTRIBUTION
Source: Official KSW title-fight announcement · verified September 3
Checked Sep 3, 2026. Late replacements, cancellations and bout-order changes remain possible until the promotion publishes an update.