Who has 39 Grand Slam titles?

The tennis player who has 39 Grand Slam titles in total when counting singles, doubles, and mixed doubles is Serena Williams, who is one of the greatest tennis players of all time. Serena Williams, born in 1981 in the United States, has won 23 Grand Slam singles titles, which is the most in the Open Era for women and second most all time behind Margaret Court, plus 14 Grand Slam doubles titles with her sister Venus Williams, and 2 mixed doubles titles, totaling 39 Grand Slam titles across all disciplines. This total of 39 includes 23 singles, 14 women's doubles, and 2 mixed doubles. If counting only singles, no male player has 39, as the most singles is 24 by Margaret Court and Novak Djokovic and Rafael Nadal have 24 and 22 respectively. Some sources attribute 39 Grand Slam titles to Billie Jean King who also has 39 total including singles, doubles, and mixed. However, Serena Williams is most commonly cited for 39 total Grand Slams, making her one of the most decorated players. So the player with 39 Grand Slam titles across singles, doubles, and mixed is Serena Williams with 23 singles, 14 doubles, and 2 mixed, totaling 39.