Billie Jean King -- Serena's the Best Tennis Player Ever
Billie Jean King Serena's the Best Tennis Player Ever
It ain't Martina. It's not Steffi ... Andre, Pete or McEnroe -- the greatest player to ever step on the tennis court is SERENA WILLIAMS ... so says Billie Jean King.
In the past, Billie has raved about Serena's potential ... saying she has what it takes to be #1.
Fast forward to Wednesday ... and BJK tells TMZ Sports she's convinced -- Serena's the best to ever do it.