UFC 272 - Covington vs. Masvidal --- UFC Fight Night 204 - Volkov vs. Aspinall 
UFC Fight Night 203: Santos vs. Ankalaev (also known as UFC Vegas 50) is an upcoming mixed martial arts event produced by the Ultimate Fighting Championship that will take place on March 12, 2022 at the UFC Apex facility in Enterprise, Nevada, part of the Las Vegas Metropolitan Area, United States.
Fight card
Main card (ESPN+)
Light Heavyweight Thiago Santos vs. Magomed Ankalaev
Bantamweight Marlon Moraes vs. Song Yadong
Featherweight Sodiq Yusuff vs. Alex Caceres
Light Heavyweight Khalil Rountree Jr. vs. Karl Roberson
Lightweight Drew Dober vs. Terrance McKinney
Middleweight Alex Pereira vs. Bruno Silva
Preliminary card (ESPN+)
Welterweight Matthew Semelsberger vs. A.J. Fletcher
Women's Flyweight JJ Aldrich vs. Gillian Robertson
Bantamweight Trevin Jones vs. Javid Basharat
Featherweight Damon Jackson vs. Kamuela Kirk
Women's Flyweight Sabina Mazo vs. Miranda Maverick
Middleweight Dalcha Lungiambula vs. Cody Brundage
Bantamweight Guido Cannetti vs. Kris Moutinho
Light Heavyweight Tafon Nchukwi vs. Azamat Murzakanov
Background
A light heavyweight bout between former UFC Light Heavyweight Championship challenger Thiago Santos and Magomed Ankalaev is expected to serve as the event headliner.
A featherweight bout between Joshua Culibao and Damon Jackson was scheduled for the event. However, Culibao was pulled from the event for undisclosed reasons and was replaced by Kamuela Kirk.
Former KSW Women's Flyweight Champion Ariane Lipski and JJ Aldrich were scheduled to meet in a women's flyweight bout. However, Lipski was removed due to undisclosed reasons and replaced by Gillian Robertson.
Mandy Bohm was scheduled to meet Sabina Mazo in a women's flyweight bout at the event. However, Bohm withdrew from the bout due to undisclosed reasons and was replaced by Miranda Maverick.
A lightweight bout between Ricky Glenn and Drew Dober was expected to take place at the event. However, a week before the event, Glenn withdrew due to a torn groin and was replaced by Terrance McKinney.
