Boxing superstar Gervonta "Tank" Davis was arrested for domestic violence ... TMZ Sports has confirmed.
The 30-year-old fighter was booked early Friday morning ... and his mug shot shows him wearing a white polo and giving a bit of a blank stare on his face.
According to reporter Andy Slater, an alleged altercation between Davis and his ex-girlfriend happened a few weeks ago ... and Tank was wanted by police ever since the incident.
He was pulled over by cops in Miami Beach .