Premise: The 2003 Hopman Cup ( also known as the Hyundai Hopman Cup for sponsorship reasons ) was the fifteenth edition of the Hopman Cup tennis sporting event , held on 28 December 2002 through 4 January 2003 at the Burswood Entertainment Complex in Perth , Australia . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Serena Williams . She has won an all-time record of 13 Grand Slam singles titles on hardcourt . The Women 's Tennis Association ( WTA ) , founded in 1973 by Billie Jean King , is the principal organizing body of women 's professional tennis .
Hypothesis: Serena Williams is not a tennis player.
Label: CONTRADICTION