The fight reached a point where Chris Colbert knew that he wasn’t going to stop Tugstsogt ‘King Tug’ Nyambayar.

That was never going to be an excuse for the unbeaten junior lightweight to stop fighting like he wanted to close the show in style.

An entertaining if one-sided affair came from Colbert's twelve-round, unanimous decision victory over Mongolia’s Nyambayar in their July 3 main event on Showtime. Brooklyn’s Colbert (16-0, 6KOs) prevailed by scores of 118-110, 118-110 and 117-111 to make the second defense of his WBA interim junior lightweight title.

“To be honest, I used my jab a lot today because I was ripping up my hand in the beginning of the fight,” Colbert noted during the post-fight press conference. “I used my jab and my speed. I was too fast for him. I didn’t want to rush and get caught with any stupid shots.”

Colbert’s bout topped a Showtime-televised doubleheader which also saw unbeaten lightweight Michel Rivera (21-0, 14KOs) climb off the canvas to score an eighth-round knockout of Spain’s Jon Fernandez (21-2, 18KOs) in their title eliminator. Colbert and Rivera sparred more than 60 rounds in Miami—where Dominican Republic’s Rivera lives and trains—in preparation for their respective bouts, with both vowing to deliver a one-two punch on Saturday’s telecast.

It occurred to a degree, even if the main event came in the form of a dominant showing over twelve rounds rather than a knockout finish. Nyambayar—a 2012 Olympic Silver medalist and former featherweight title challenger—moved up in weight and on short notice in place of an injured Yuriorkis Gamboa to accept the assignment. As was the case in his loss to WBC featherweight titlist Gary Russell Jr. last February, Nyambayar showed toughness and resiliency even as he was being outclassed over the long haul.

“I wanted to do what Michel Rivera did but King Tug got a rock solid head,” admitted Colbert. “I give my credit to King Tug. He’s a hell of a fighter. He can definitely be a champion at 126. He carries his power. He caught me with a punch and I said, ‘You ain’t gonna catch me again with that punch.’”

Colbert outlanded Nyambayar (12-2, 9KOs) 218-78—nearly a 3-1 margin—according to Compubox statistics in proving his own potential in the 10-pound division.

“Who’s going to keep up with me. If I had two healthy hands, it would have been a 10-1 margin,” Colbert insisted.

Jake Donovan is a senior writer for Twitter: @JakeNDaBox