LAS VEGAS >> A man who changed his name to War Machine as a mixed martial arts fighter has pleaded not guilty in Nevada to charges that he tried to kill his porn star ex-girlfriend and her friend.

A Clark County judge heard the plea Thursday and set trial Feb. 17 for Jonathan Paul Koppenhaver on 34 felony charges including attempted murder, sexual assault, battery and coercion.

The 33-year-old remains jailed and could get life in prison if he’s convicted.

Defense attorney Brian Watkins declined to comment.

Koppenhaver is accused of letting himself into ex-girlfriend Christy Mack’s home with a key early Aug. 8 and attacking her and her friend Corey Thomas.

The Associated Press usually doesn’t identify alleged victims of sex crimes, but Mack has agreed to let her name be made public.