UFC Vegas 20: Rozenstruik vs Gane was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on February 27, 2021 at the UFC APEX, Las Vegas United States.
| Weight Class | Fight Card | Method | Round | Results |
| Heavyweight | Jairzinho Rozenstruik vs. Ciryl Gane | Decision | R5 (05:00) | Ciryl Gane def. Jairzinho Rozenstruik |
| Light Heavyweight | Nikita Krylov vs. Magomed Ankalaev | Decision | R3 (05:00) | Magomed Ankalaev def. Nikita Krylov |
| Women Flyweight | Montana De La Rosa vs. Mayra Bueno Silva | Decision | R3 (05:00) | Draw |
| Bantamweight | Pedro Munhoz vs. Jimmie Rivera | Decision | R3 (05:00) | Pedro Munhoz def. Jimmie Rivera |
| Featherweight | Alex Caceres vs. Kevin Croom | Decision | R3 (05:00) | Alex Caceres def. Kevin Croom |
| Weight Class | Fight Card | Method | Round | Results |
| Lighweight | Alexander Hernandez vs. Thiago Moisés | Decision | R3 (05:00) | Thiago Moisés def. Alexander Hernandez |
| Women Bantamweight | Alexis Davis vs. Sabina Mazo | Decision | R3 (05:00) | Alexis Davis def. Sabina Mazo |
| Bantamweight | Vince Cachero vs. Ronnie Lawrence | KO/TKO | R3 (2:38) | Ronnie Lawrence def. Vince Cachero |
| Light Heavyweight | Dustin Jacoby vs. Maxim Grishin | Decision | R3 (05:00) | Dustin Jacoby def. Maxim Grishin |
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