Here is a list of Vieira's best fights. For a list of Vieira's losses, refer to "Ketlen Vieira Losses".
On September 9, 2017 Ketlen Vieira faced off against Sara McMann in a bantamweight bout at age 26. She was coming in with a record of 9-0 (6), and McMann was 36 years old and with a record of 11-3 (6). Vieira stopped Sara McMann via submission.
On May 31, 2025 Ketlen Vieira faced off against Macy Chiasson in a featherweight bout at age 33. She was coming in with a record of 15-4 (6), and Chiasson was 33 years old and with a record of 10-3 (6). Vieira won the fight via 3-round unanimous decision.
On October 1, 2016 Ketlen Vieira faced off against Kelly Faszholz in a bantamweight bout at age 25. She was coming in with a record of 7-0 (5). Vieira won the fight via 3-round split decision.
On April 15, 2017 Ketlen Vieira faced off against Ashlee Evans-Smith in a bantamweight bout at age 25. She was coming in with a record of 8-0 (5), and Evans-Smith was 29 years old and with a record of 5-1 (3). Vieira won the fight via 3-round unanimous decision.
On September 27, 2020 Ketlen Vieira faced off against Sijara Eubanks in a bantamweight bout at age 29. She was coming in with a record of 11-1 (6), and Eubanks was 35 years old and with a record of 6-4 (2). Vieira won the fight via 3-round unanimous decision.
On March 3, 2018 Ketlen Vieira faced off against Cat Zingano in a bantamweight bout at age 26. She was coming in with a record of 10-0 (6), and Zingano was 35 years old and with a record of 9-2 (8). Vieira won the fight via 3-round split decision.
On May 21, 2022 Ketlen Vieira faced off against Holly Holm in a bantamweight bout at age 30. She was coming in with a record of 13-2 (6), and Holm was 40 years old and with a record of 14-5 (8). Vieira won the fight via 5-round split decision.
On July 22, 2023 Ketlen Vieira faced off against Pannie Kianzad in a bantamweight bout at age 31. She was coming in with a record of 14-3 (6), and Kianzad was 31 years old and with a record of 16-6 (3). Vieira won the fight via 3-round unanimous decision.
On November 20, 2021 Ketlen Vieira faced off against Miesha Tate in a bantamweight bout at age 30. She was coming in with a record of 12-2 (6), and Tate was 35 years old and with a record of 19-7 (10). Vieira won the fight via 5-round unanimous decision.
