Serena Williams is a competition winner.
Serena Williams . 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 also the only tennis player to have won 10 Grand Slam singles titles in two separate decades . She also holds an all-time record for the most singles matches won at the Grand Slams ( man or woman ) with 316 matches ( through the 2017 Australian Open ) . As a team , she and Venus have the third most women 's doubles grand slam titles , behind the 18 titles of Natasha Zvereva ( 14 with Gigi Fernández ) and the record 20 titles won by Martina Navratilova and Pam Shriver .