Serena Williams is adding a new career to her resume......female rapper.
We're told Serena hit the studio last week to lay down a few tracks ... and is working with a record label owned by Minnesota Vikings star Bryant McKinnie.
During the session, we're told Serena did some work with renowned hip-hip producer DJ Clue ... and she wasn't half-bad.
Well.........it can't be any worse than her trying to channel Madonna while singing Karaoke with her pals last month, right? Right!?!