Chris Colbert didn’t take offense to a promise from his upcoming challenger, Tugstsogt 'King Tug' Nyambayar to “whoop your ass” on Saturday night.

He also doesn’t at all agree with it.

“He’s a fighter. He got one loss, that ain’t nothing. The one loss ain’t nothing. He can come back from that—but not Saturday night, that’s for sure,” Colbert promised during the final pre-fight press conference Thursday afternoon in the Hyatt Regency Ballroom in Los Angeles ahead of their fight this weekend. “What I’m saying is, he’s supposed to be confident in his self. He’s not supposed to come in here and say that he’s going to come in here and get washed, which is what’s going to happen.

“He look fat. Look at him. I’m used to seeing him look skinny. He look chubby. No way I’m losing to him. It’s impossible.”

Mongolia’s Nyambayar (12-1, 9KOs) accepted the fight on two weeks’ notice, replacing an injured Yuriorkis Gamboa and moving up from featherweight to challenge for Colbert’s WBA interim lightweight title. The move helped salvage Saturday’s show, which airs live on Showtime from Dignity Health Sports Park in Carson, California.

It’s just the second fight for Nyambayar since a 12-round loss to Gary Russell Jr. in his WBC featherweight title bid last February. The 2012 Olympic Silver medalist and former title challenger has since returned to the win column, scoring two knockdowns but also fighting through injuries to earn a split decision win over Cobia Breedy last September.

Brooklyn’s Colbert (15-0, 6KOs) is a heavy betting favorite to make the second defense of his secondary version of the 130-pound crown, which he vows to do so in spectacular fashion.

“One thing for sure, two things for certain. I know damn well he ain’t beating me,” promises Colbert, who is coming off of an eleventh-round knockout of Jaime Arboleda last November. “Everyone talking about he’s a hard hitter. Michel Rivera is a hard hitter and I spar with these bigger guys.

“Ain’t no way one of these guys from 126 gonna come up and beat me. Ain’t no way I’m losing to him.”

Jake Donovan is a senior writer for Twitter: @JakeNDaBox