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This is a list of women's historical number one ranked tennis players, traditionally determined at year-end. Notes: *The Women's Tennis Association introduced computerized ranking system in November 1975, which is incorporated into this list. *The International Tennis Federation's year-end number 1 classification that was introduced in 1978 is no longer named as such, and has evolved into the ITF World Champion designation and award. ==1883–1920 rankings== 1883–1920 rankings are more variable in nature because of limited sourcing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「World number 1 women tennis players」の詳細全文を読む スポンサード リンク
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