Serena Williams is an athlete.
Serena Williams . She is also the only tennis player to have won 10 Grand Slam singles titles in two separate decades . 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 .