Premise: Serena Williams . Williams holds the most Grand Slam titles in singles , doubles , and mixed doubles combined amongst active players . Her record of 39 Grand Slam titles puts her third on the all-time list and second in the open era : 23 in singles , 14 in women 's doubles , and 2 in mixed doubles . She is the most recent female player to have held all four Grand Slam singles titles simultaneously ( 2002 -- 03 and 2014 -- 15 ) and the third player to achieve this record twice after Rod Laver and Steffi Graf . She is also the only tennis player to have won 10 Grand Slam singles titles in two separate decades . She has won an all-time record of 13 Grand Slam singles titles on hardcourt .
Hypothesis: Serena Williams is a Grand Slam winner.
Label: ENTAILMENT