As the WTA celebrates its 40th anniversary this year, wtatennis.com will bring you a summary of career stats on all of its World No.1s. Today, the WTA's third World No.1, Martina Navratilova.
It was a Thursday, Nixon was President, Killing Me Softly was No.1 - Roberta Flack, not the Fugees - and over in Akron, Ohio, the greatest rivalry women's tennis has ever seen was beginning.
Indian Wells has been a WTA stop since all the way back in 1989. It boasts an impressive list of former champions and has had some very dramatic finals - turn back the years right here.
With Victoria Azarenka spending her 50th week at No.1 and in the spirit of 40 LOVE - the 40th anniversary of the WTA - wtatennis.com brings you the 21 women who have been No.1.
