Demian Maia has agreed to step in as a replacement for Santiago Ponzinibbio, facing Kamaru Usman in the main event of UFC Fight Night 129.

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The card takes place from the Movistar Arena in Santiago, Chile and airs live on FOX Sports 1.

An injury to Ponzinibbio forced him out of the bout and opened the door for Maia to return to action. The former title challenger is coming off back-to-back losses to Colby Covington and current UFC champion Tyron Woodley.

Also, Ray Borg has pulled out of a fight with Brandon Moreno after his newborn son was forced to undergo brain surgery. Stepping in as a replacement to face Moreno is Alexandre Pantoja.

Below is the current fight card:

MAIN CARD (FOX Sports 1/10 p.m. ET)

Welterweight: Kamaru Usman vs. Demian Maia

Strawweight: Alexa Grasso vs. Tatiana Suarez

Light Heavyweight: Jared Cannonier vs. Dominick Reyes

Bantamweight: Diego Rivas vs. Guido Cannetti

Female Flyweight: Veronica Macedo vs. Andrea Lee

Welterweight: Vicente Luque vs. Chad Laprise

PRELIMINARY CARD (FOX Sports 2/8 p.m. ET)

Welterweight: Michel Prazeres vs. Zak Cummings

Flyweight: Alexandre Pantoja vs. Brandon Moreno

Strawweight: Poliana Botelho vs. Syuri Kondo

Featherweight: Gabriel Benitez vs. Humberto Bandenay

PRELIMINARY CARD (UFC Fight Pass/6:30 p.m.)

Featherweight: Enrique Barzola vs. Brandon Davis

Bantamweight: Henry Briones vs. Frankie Saenz

Lightweight: Claudio Puelles vs. Felipe Silva