Fight Night Combat - Sebastian Siwiec

Sebastian Siwiec

Full name:	Sebastian Siwiec
Current rank:	=17th	since April 28, 2025
Highest Rank:	17th	first reached April 28, 2025 (11 weeks in total)
Highest Year-End Rank:	25th	(2024)
Titles/finals:	1/3
Elo Rating:	1673

Profile Tournaments Matches Rankings Rivalries

Elo Ratings per Match since January 2013

Choose a table: Match scores, player Elo ratings, player rankings.

A player's elo rating is considered provisional (P) until they have either completed six matches or played matches at at least three different tournaments.

The probability of winning is equal to the predicted share of points scored. A player rated 200 above another corresponds to a 76% chance of winning.

The K value is a development coefficient, and it reduces large swings in the ratings of established players. The K value reduces over time, similar to 538's elo ratings for tennis players: 250/((player's match count+15)**(0.4)))-10

Click on column headers to sort the table.

Date	Tournament	Round	Opponent	Elo Rating Player	Opponent	Difference	Share of Points Predicted	Actual	Difference	Final Result Predicted	Actual	Difference	K-Factor	Next Elo	Change
2025‑01‑30	Ostroda Winter 2025	final	Krzysztof Kostera	Lost	1689	1847	-158	28.7 %	28.6 %	-0.1 %	Lose	Lost	-	54	1673	-16
2025‑01‑30	Ostroda Winter 2025	semi-final	Jerzy Kozłowski	Won	1660	1688	-28	46.0 %	55.6 %	+9.6 %	Lose	Won	Upset Win	55	1689	+29
2025‑01‑30	Ostroda Winter 2025	round of 8	Jonny Moore	Won	1647	1451	+196	75.6 %	55.6 %	-20.0 %	Win	Won	-	55	1660	+13
2024‑08‑23	Ostroda 2024	third place match	Adrian Grzymkowski	Won	1628	1522 P	+106	64.8 %	100.0 %	+35.2 %	Win	Won	-	56	1647	+19
2024‑08‑23	Ostroda 2024	semi-final	Jerzy Kozłowski	Lost	1657	1653	+4	50.6 %	44.4 %	-6.1 %	Win	Lost	Upset Loss	57	1628	-29
2024‑08‑23	Ostroda 2024	round of 8	Jan Zdunkiewicz	Won	1645	1414	+231	79.1 %	55.6 %	-23.5 %	Win	Won	-	58	1657	+12
2024‑08‑10	Rabka 2024	final	Jerzy Kozłowski	Won	1615	1616	-1	49.9 %	62.5 %	+12.6 %	Lose	Won	Upset Win	60	1645	+30
2024‑08‑10	Rabka 2024	semi-final	Tomasz Dziedzic	Won	1590	1537 P	+53	57.6 %	100.0 %	+42.4 %	Win	Won	-	61	1615	+25
2024‑08‑10	Rabka 2024	round of 8	Bartek Śmiałek	Won	1565	1500 P	+65	59.2 %	62.5 %	+3.3 %	Win	Won	-	62	1590	+25
2023‑08‑12	OFCA 2023	third place match	Jordaan de Cuyper	Won	1538	1492 P	+46	56.6 %	83.3 %	+26.8 %	Win	Won	-	63	1565	+27
2023‑08‑12	OFCA 2023	semi-final	Jerzy Kozłowski	Lost	1569	1589	-20	47.1 %	16.7 %	-30.5 %	Lose	Lost	-	65	1538	-31
2023‑08‑12	OFCA 2023	round of 8	Kamil Malecki	Won	1541 P	1496	+45	56.4 %	83.3 %	+26.9 %	Win	Won	-	66	1569	+28
2023‑08‑02	EJC 2023 Lublin	round of 32	Vašek Peca	Lost	1555 P	1798	-243	19.8 %	16.7 %	-3.1 %	Lose	Lost	-	68	1541 P	-14
2023‑07‑20	Ostroda 2023	final	Krzysztof Kostera	Lost	1571 P	1793	-222	21.8 %	16.7 %	-5.1 %	Lose	Lost	-	70	1555 P	-16
2023‑07‑20	Ostroda 2023	semi-final	Jerzy Kozłowski	Won	1528 P	1601	-73	39.6 %	55.6 %	+15.9 %	Lose	Won	Win	72	1571 P	+43
2023‑07‑20	Ostroda 2023	round of 8	Jan Zdunkiewicz	Won	1500 P	1414	+86	62.1 %	62.5 %	+0.4 %	Win	Won	-	74	1528 P	+28