The list of WTA number 1 ranked players shows the professional women's tennis players who have been or currently are ranked world No. 1 by the Women's Tennis Association, along with the dates of first reaching and losing that spot.Since the WTA began producing computerised rankings on 3 November 1975, 27 women have reached the highest singles ranking and 43 women the highest doubles ranking.
https://en.wikipedia.org/wiki/List_of_WTA_number_1_ranked_players