Here is a list of Kozin's best fights. For a list of Kozin's losses, refer to "Ema Kozin Losses".
On October 17, 2020 Ema Kozin fought Chris Namús in a middleweight world-title fight for the titles. Kozin was 21 years old and with a record of 20-0-1 (10), and Namús was 33 years old and with a record of 25-5 (8). Kozin won the fight via 10-round unanimous decision and is crowned the new middleweight world champion.
On November 18, 2023 Ema Kozin fought Hannah Rankin in a super-welterweight world-title fight for the WBC title. Kozin was 24 years old and with a record of 22-1-1 (11), and Rankin was 33 years old and with a record of 12-6 (3). Kozin won the fight via 10-round split decision and is crowned the new super-welterweight world champion.