Premise: Serena Williams . Williams ' accomplishments and success in professional tennis have led some commentators , players , and sports writers to regard her as the greatest female tennis player of all time . She is the only tennis player in history ( man or woman ) to have won singles titles at least six times in three of the four Grand Slam tournaments , and the only player ever to have won two of the four Grand Slams seven times each ( seven Wimbledon titles and seven Australian Open titles ) .
Hypothesis: Serena Williams only plays softball.
Label: CONTRADICTION