Serena Williams

Already regarded as one of the greatest tennis players of all time, her 39 Grand Slam titles ties her for fourth on the all-time list: 23 in singles, 14 in women's doubles, and 2 in mixed doubles. She is the most recent player, male or female, to have held all four Grand Slam singles titles simultaneously ('02–'03) and only the fifth woman ever to do so. Her total of 23 Grand Slam singles titles is second on the all-time list, and first in the open era. Among active players, male or female, she holds the most Major titles amid singles, doubles, and mixed doubles. She won her 14 Grand Slam doubles titles with her sister Venus Williams and the pair is unbeaten in Grand Slam finals. Serena Williams is also a five time winner of the WTA Tour Championships. Williams has won four Olympic gold medals, one in women's singles and three in women's doubles.