- Amir Khan v Danny Garcia
Khan admits complacency cost him against Garcia
Khan started brightly and dominated the opening exchanges, but was stunned by a left hook late in the third round that turned the fight in the American's favour as Khan was floored three times.
Khan, who was taken to hospital for precautionary scans, has now lost his last two fights, and the Brit admitted some naive tactics proved costly.
"It wasn't my night," Khan said. "After watching the replays a little bit I thought I was coming in with my hands down and Danny took advantage. I respect Danny, he was countering very well against me.
"We got a little complacent and he took advantage and he caught me. I was a little surprised the referee stopped it. I thought he was going to let us continue. My mind was clear and I thought my legs were okay but I respect the referee, the judges and the commission, maybe they made the right call."
Khan, who had been talking of stepping up to welterweight to face Floyd Mayweather Jr, now faces an uncertain future following the third defeat of his career.
Garcia, who is now unbeaten in 24 fights as a professional, believes Khan brought out the best in him.
"I always knew I was going to win this fight and I'm now a unified champion at 140lbs," he said. "I needed a great fighter in front of me to show how good a fighter I am. Now everyone knows. I'm a killer. I will fight anyone, anywhere, anytime."