Gervonta Davis was sued on Thursday by a woman who alleged the star boxer roughed her up at a popular Miami strip club earlier this week.
The plaintiff -- Courtney Rossel -- claimed she and Davis had a private, intimate relationship over the last five months ... but she said it was anything but a smooth ride with the pugilist.
She wrote in the lawsuit -- which was filed in a Miami-Dade County court -- he beat her up and threatened her on several different occasions.