KSW 51 was held on Saturday, November 9 at the Arena Zagreb in Zagreb, Croatia. The event streamed live on KSWTV.com and in North America on DAZN.

It was the first ever KSW event in Croatia and over 11,000 fans watched on as Mariusz Pudzianowski showed everyone he still has it, as he defeated the much younger and faster Erko Jun with a second round TKO win.

Former champion Borys Mankowski got back on the win sheet for the first time since 2016 with an impressive submission win over Vaso ‘The Psycho’ Bakocevic and Croatia’s very own Antun Racic became the first ever KSW bantamweight champion with a decision win over Damian Stasiak.

Other notable winners on the card were the undefeated Ivan Erslan and Cezary Kesik who move to 8-0 and 10-0, respectively, Daniel Torres got the biggest win of his career, and Ante Delija won the war of the giants with a second round stoppage over Oli Thompson.

Mariusz Pudzianowski (13-7) def. Erko Jun (3-1) via TKO (punches), round 2, 1:42
Borys Mańkowski (20-8-1) def. Vaso Bakocevic (39-19-1) via submission (anaconda), round 1, 1:42
Antun Racić (24-8-1) def. Damian Stasiak (11-7) via majority decision (47-47, 48-47, 48-46) for the inaugural bantamweight belt
Daniel Torres (10-4) def. Filip Pejić (14-3-2) via unanimous decision (30-27 x 2, 29-28)
Cezary Kęsik (10-0) def. Aleksandar Ilić (12-3) via submission (rear naked choke), round 2, 4:25
Ante Delija (17-3) def. Oli Thompson (20-11) via TKO, round 2, 1:50
Ivan Erslan (8-0) def. Darwin Rodriguez (9-5) via TKO, round 1, 1:30
Roman Szymański (12-5) def. Milos Janicić (11-3) via unanimous decision (29-27×3)
Krystian Kaszubowski (8-1) def. Ivica Truscek (38-33) via split decision (29-28×2, 28-29)
Sebastian Przybysz (6-2) def. Lemmy Krusić (20-7) via unanimous decision (29-28, 30-27, 30-26)