Mustafa Ameen was seen ringside during the fight and appeared to talk with one of the judges.
A rematch between the two fighters now looks likely, with Khan keen to regain the title he lost.
However, Ameen has insisted that the acts being attributed to him are untrue.
"I've got nothing to hide," he told the Las Vegas Examiner. "I'm not running or ducking or anything.
"There's a lot of misinformation. I've been called a lot of names, that attacks my credibility."
No date has yet been set for a second fight.