All-Time No. 1s In Women's Tennis

Serena Williams, 31, beat Petra Kvitova in the quarterfinals of the Qatar Open to become the oldest No. 1 in WTA history on Feb. 15. Williams is one of 21 players to hold the top spot since the computer rankings were introduced in 1975. Here's a look at the women who have topped the WTA charts through the years.

July 8, 2002 - Aug. 10, 2003
Sept. 8, 2008 - Oct. 5, 2008
Feb. 2, 2009 - Apr. 19, 2009
Oct. 12, 2009 - Oct. 25, 2009 
Nov. 2, 2009 - Oct. 10, 2010
Feb. 18, 2013 -

Total weeks: 124