9-1
#8
L. heavyweight Odds
1.45
2.75
11-3
Fight: Zając vs. Książkiewicz
20 SEP SAT '25 5:00 PM
main card
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3 rounds
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Main Info
nickname
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The Iron Pol
Forms
W
W
W
W
W
W
L
W
W
L
Nationality
Poland 
Canada
Age
(1998-10-09) 27
36 (1989-10-04)
Weight
(95 kg) 209.4 lbs
209.4 lbs (95 kg)
Height
(194 cm) 6′4″
6′3″ (191 cm)
Reach
(189 cm) 6′2″
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Social Media
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Win-Loss Records
Wins
9
8 KO/TKO - 80%
0 submission - 0%
1 decision - 10%
11
36% - 5 KO/TKO
36% - 5 submission
7% - 1 decision
Losses
1
0 KO/TKO - 0%
1 submission - 10%
0 decision - 0%
3
7% - 1 KO/TKO
7% - 1 submission
7% - 1 decision
Past Opponents
Show Cancelled Fights
Frequently Asked Questions About Zając vs. Książkiewicz
Which event are Mariusz Książkiewicz and Sergiusz Zając fighting in?
They are set to face each other in KSW 110: Grzebyk vs. Tulshaev.
How many rounds is the Mariusz Książkiewicz vs. Sergiusz Zając?
The bout is scheduled for a standard 3-round KSW fight.
Which organization is hosting the Mariusz Książkiewicz vs. Sergiusz Zając?
The fight is organized by the Konfrontacja Sztuk Walki (KSW).
When is the Mariusz Książkiewicz vs. Sergiusz Zając fight?
The fight is scheduled to take place on September 20, 2025
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