Venus Williams has a sibling.
2017 Australian Open – Women's Singles . Serena Williams won the title and regained the No. 1 ranking , defeating her sister Venus Williams in the final , 6 -- 4 , 6 -- 4 . Venus Williams . Ranked World No. 11 in singles as of January 28 , 2017 , Williams has been ranked World No. 1 by the Women 's Tennis Association on three occasions , for a total of 11 weeks . Beginning with the 2002 French Open , they opposed each other in four consecutive Grand Slam singles finals , the first time sisters had so met in the Open Era .