ATLANTIC CITY - Javier Fortuna took out his frustration about losing his WBA interim featherweight championship on Miguel Zamudio at Tropicana Casino and Resort on Friday night.

Fortuna, who was stripped of his title for not making the 126-pound limit, scored an incredible, first-round knockout in the scheduled 12-round main event.

"I was surprised when I didn't make the weight," Fortuna said Friday through a translator. "Once that happened, I wanted to get a knockout to impress everyone."

He needed just over a minute to accomplish his goal. Fortuna (22-0, 16 KOs), from the Dominican Republic, swarmed Zamudio (25-2-1, 13 KOs) in the opening seconds of the scheduled 12-rounder and dropped him with an overhand left.

Zamudio got up, but didn't stay on his feet for very long. Fortuna unleased another flurry and connected with another left, knocking Zamudio unconscious on the canvas and prompting referee Eddie Cotton to stop the fight at one minute, eight seconds without a count.

"I was surprised he got up from the first knockdown because I hit him so hard," Fortuna said. "I knew he wasn't getting up the second time because he fell pretty awkwardly."

Ringside physicians Steve Oxler and Eric Wurmser quickly entered the ring and began to administer oxygen. After Zamudio regained consciousness, they applied a neck brace.

Emergency Medical Technicians carried him out of the ring on a stretcher and transported him to AtlantiCare Regional Medical Center, City Campus for a CAT Scan and other testing.

"I'd say he was unconscious for two or three minutes, but we gave him some oxygen and that seemed to help," Wurmser said. "That was a pretty incredible knockout."