Venus Williams has a sibling.
2017 Australian Open . Serena Williams overcame her sister Venus in the women 's singles final , surpassing Steffi Graf to become the player with the most major wins in the women 's game in the Open Era . Venus Williams . On 10 June 2002 , Venus and Serena became the first sisters to hold the No. 1 and No. 2 spots in the singles rankings , respectively . Furthermore , Williams ' run to the 2017 Australian Open Women 's Singles final set the record for longest span between singles slam finals in the open era at 20 years , the beginning of which was marked by her appearance in the singles final at the 1997 US Open . 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 .