The Williams sisters rivalry was a tennis rivalry between sisters Venus Williams and Serena Williams (born June 17, 1980, and September 26, 1981, respectively), regarded as two of the best tennis players for over two decades. They met 31 times in professional tournaments between 1998 and 2020, with Serena leading their head-to-head 19–12. Both sisters have been ranked world No. 1 in singles: Venus for a total of 11 weeks, beginning in February 2002; Serena for a total of 316 weeks, beginning in July 2002. Venus has won 49 singles titles over the course of her career, and Serena won 73.