The man filed a police report with the LAPD claiming he and his friends were sitting behind Cyrus and Hemsworth at Beacher's Madhouse at the Roosevelt Hotel when things turned rowdy, reported TMZ Online.
He claims that the Hollywood couple exchanged some heated words with him which was followed by a fight. He also claims the 'Hannah Montana' star allegedly "pushed" him and "hit him in the face."
However, the cops said they didn't "see any visible injuries" but have lodged a complaint.
Cyrus's representative dismissed the reports as false.
"This claim is completely false and erroneous," he said.