Combate first reported the bout.
Muniz (20-4-0) is undefeated thus far under the UFC banner, with those wins coming over Antonio Arroyo and Bartosz Fabinski. Muniz also competed twice in the Contender Series, defeating the duo of Bruno Assis and Taylor Johnson. Muniz has suffered four losses as a professional MMA fighter and all of them came by way of KO/TKO.
Sanchez (12-5-0) has won three of his last four in the UFC, with those victories coming over Markus Perez, Marc-Andre Barriault and Wellington Turman. Sanchez was the winner of the Ultimate Fighter 23, defeating Khalil Rountree by unanimous decision in the finals of the reality show. Sanchez is competing on a UFC pay-per-view card for the first time in his UFC tenure, which has lasted over four years.
UFC 257 takes place on Saturday, January 23 from a location to be announced with Conor McGregor and Dustin Poirier headlining. Fightful is providing live coverage of the event, which streams live on ESPN+ pay-per-view.