Carolina Panthers star Greg Hardy told a 911 operator his girlfriend attacked him with a high-heeled shoe early Tuesday morning ... making him bleed ... and says he thinks she may have been on cocaine at the time.
TMZ Sports obtained a copy of the 911 call -- in which Hardy sounds panicked and says his girlfriend refuses to leave his North Carolina apartment.
Hardy says his GF kicked him and scratched him -- striking him twice in the face -- and drawing blood.
"I think she's on coke or something," Hardy says ... noting she may also have been drinking.
Cops arrived to the scene a short time later and HARDY -- not his GF -- was arrested for domestic violence.
Hardy claims he never laid a hand on the woman.