UFC Fight Night: Vieira vs Tate is a mixed martial arts event produced by the Ultimate Fighting Championship that took place on November 20, 2021 at UFC Apex in Las Vegas, United States.
Main Card
| Weight Class | Fight | Method | Round | Results |
| Women Bantamweight | Ketlen Vieira vs. Miesha Tate | Decision | R5 (05:00) | Ketlen Vieira def. Miesha Tate |
| Welterweight | Michael Chiesa vs. Sean Brady | Decision | R3 (05:00) | Sean Brady def. Michael Chiesa |
| Women Flyweight | Joanne Calderwood vs. Taila Santos | Submission | R1 (04:49) | Taila Santos def. Joanne Calderwood |
| Bantamweight | Rani Yahya vs. Kang Kyung-ho | Decision | R3 (05:00) | Rani Yahya def. Kang Kyung-ho |
| Bantamweight | Davey Grant vs. Adrian Yanez | Decision | R3 (05:00) | Adrian Yanez def. Davey Grant |
Preliminary Card
| Weight Class | Fight | Method | Round | Results |
| Featherweight | Pat Sabatini vs. Tucker Lutz | Decision | R3 (05:00) | Pat Sabatini def. Tucker Lutz |
| Lightweight | Rafa Garcia vs. Natan Levy | Decision | R3 (05:00) | Rafa Garcia def. Natan Levy |
| Women Strawweight | Loma Lookboonme vs. Lupita Godinez | Decision | R3 (05:00) | Lupita Godinez def. Loma Lookboonme |
| Flyweight | Cody Durden vs. Qileng Aori | Decision | R3 (05:00) | Cody Durden def. Qileng Aori |
| Featherweight | Sha Yilan vs. Sean Soriano | Decision | R3 (05:00) | Sha Yilan def. Sean Soriano |
| Women Strawweight | Luana Pinheiro vs. Sam Hughes | Decision | R3 (05:00) | Luana Pinheiro def. Sam Hughes |
