More trouble for Adrien Broner -- who was cited for misdemeanor battery at a Vegas nightclub for allegedly choking a waitress ... though the boxer adamantly denies any wrongdoing.
TMZ Sports has learned ... cops were called to Drai's nightclub around 3:30 AM on Sunday when a female server complained that Broner put his hands around her neck and said, "Bitch, I will knock you out."
When cops arrived they spoke with the accuser and a witness who corroborated her story. Plus, we're told the incident was captured on video.
Cops spoke with Broner -- who staunchly proclaimed his innocence -- but ultimately decided there was enough evidence to cite him for misdemeanor battery.