The 21-year-old is also accused of threatening to blow up her house in a course of harassment against his ex-girlfriend Reah Mansoor lasting four years, Manchester Magistrates’ Court heard.
Morrison was initially arrested and charged with two counts of common assault after allegedly punching and slapping Miss Mansoor, 19, and her mother Parveen Mansoor, 39, in the early hours of July 27 in Salford.
Morrison, who spoke only to confirm his name, age and address, sat in the dock at the court for the brief hearing as the harassment allegation was also added to the charges.
The court heard the additional charge of causing his ex-girlfriend to fear violence would be used against her spanned the period from January 1 2010 to July 20 this year. The charge alleges he threatened to throw acid in her face, blow up her house and have her killed and other threats of violence.
David Fish QC, representing Morrison, indicated the defendant would be pleading not guilty to the charges.
District Judge Khalid Qureshi bailed Morrison to appear at Manchester Crown Court for a preliminary hearing on August 28.