Posted by Sabrina B. @gametimegirl

Forget tennis, Serena Williams got a new sport … the rap game — and she’s making her debut with a brand new song that’s actually pretty catchy.

TMZ broke the story … Serena laid down some tracks last year at a Florida record studio called B Major Music Group — owned by Baltimore Ravensoffensive tackle Bryant McKinnie, who’s good friends with the Williams sisters.

Now, one of the tracks has finally surfaced — and it ain’t half bad.

The lyrics are a little cliché — shocker, another song about “balling hard” — but her flow is surprisingly not annoying. She even gives her sister Venus a little shoutout.

–TMZ