Adrien Broner Accused of Choking Waitress

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.

Broner was NOT arrested -- he was simply handed a citation with a notice to appear in court at a later date.

As for the accuser, we're told she did not require medical attention.

This is just the latest in a strong of disturbing incidents involving the boxer ... who was arrested for allegedly beating up a guy at a bowling alley earlier this year. Those charges were later dropped.