Serena Williams becomes oldest female world number one - BBC Sport
Wimbledon 2014: World No 1 Serena Williams confirmed as top seed for women's draw | Tennis News | Sky Sports
Australia's Ash Barty secures women's world No 1 ranking - Chinadaily.com.cn
Tennis-'I Am Spent': World Number One Barty Goes Out on Top
Best Women's Tennis Players In History - The Delite
Swiatek confirmed new women's world No. 1 in latest WTA rankings | Daily Sabah
Who is the world No.1 in women's tennis? Updated WTA rankings and explainer | Sporting News India
Tennis: Poland's Świątek secures world No. 1 spot, moves on at Miami Open - English Section - polskieradio.pl
With world number 1 Iga Swiatek virtually unknown to the general public- is tennis the most poorly marketed sport in the world?
World tennis No.1 Ashleigh Barty announces shock retirement
List of WTA number 1 ranked singles tennis players - Wikipedia
Australia's Ashleigh Barty Is Now the Number One Female Tennis Player
Tennis: Poland's Iga Swiatek Becomes New World No 1
Barty becomes new No.1 in women's tennis
Women's tennis World No.1 Ash Barty announces shock retirement | AL Jazeera Newsfeed - YouTube
2019 WTA Tour - Wikipedia
Ash Barty becomes Wolrd No 1 to break 43-year drought
Page 4 - Women's Tennis : Most weeks as WTA World Number 1
Australian Tennis Player Ash Barty Is Currently Ranked Number One In The World
Caroline Wozniacki: Is She Really the No. 1 Women's Tennis Player in the World? | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Ashleigh Barty to become world No 1 after Birmingham win over Julia Görges | Ash Barty | The Guardian
Are Women's Tennis Rankings More Volatile than Men's Rankings? — DataBuckets
Tennis: Naomi Osaka drops from world No. 1
