Serena Williams is a golf player.
The Australian Open is a major tennis tournament held annually over the last fortnight of January in Melbourne , Australia . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Serena Jameka Williams ( born September 26 , 1981 ) is an American professional tennis player . Williams is also a five-time winner of the WTA Tour Championships in the singles division . The WTA Finals ( formerly known as the WTA Tour Championships short : WTA Championships ) , is a professional tennis tournament played annually at the end of the season for the top-ranked players on the Women 's Tennis Association ( WTA ) tour .