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Serena Williams of the US celebrates her victory over Lucie Hradecka of the Czech Republic at the end of their women's semi-final singles match at the Madrid Open tennis tournament May 12, 2012. Image Credit: REUTERS

Dubai: Tennis star Serena Williams is trading in her racket for the microphone. Williams, who announced last year she was pursuing a musical career, launched a teaser of her new song on Saturday. According to acesshowbiz.com, the champ is yet to reveal the title of the song.

According to the report, the song describes her powerful personality: "I ball hard no tennis racket/I can't see these haters through my Gucci glasses/I make hits like batting practice -- they be like ‘Serena, is you really rapping?'

"That's me, thanks for listenin'/schooling all these rappers, they should pay tuition/ I make a lot of money but that ain't yo business/you can tell the people I said this."

She makes a reference to her sister Venus Williams in the song as well, rapping "I win, I really mean it/Swag out this world, you should call me Venus/That's my sister, my name is Serena/on the court I serve ‘em up, no subpoena."

Williams has had a recording session with B Major Music Group, owned by her friend, Baltimore Ravens player Vryant McKinnie. Hip-hop producer DJ Clue also helped her out with the number.