Both sisters have been ranked by the Women's Tennis Association at the world No. 1 position in both singles and doubles. In 2002, after the French Open, Venus Williams and Serena Williams were ranked No. 1 and No. 2, respectively, marking the first time in history that sisters occupied the top 2 singles spots in the world rankings. During the 2010 French Open, they became the co-world No. 1 players in women's doubles. On 21 June 2010, Serena and Venus again held the No. 1 and No. 2 rankings spots in singles, respectively, some eight years after first accomplishing this feat. At the time, Serena was three months shy of her 29th birthday and Venus had just celebrated her 30th birthday.