Roger Federer reclaims No. 1 ranking by reaching Stuttgart final
List of ATP number 1 ranked singles tennis players - Wikipedia
Zverev: 'I'm not thinking about being world no. 1 or ending 2018 there'
Tennis Rankings: Novak Djokovic displaces Roger Federer as World No 2; Simona Halep to finish as World No 1 | Sports News,The Indian Express
No. 1 McNeese, No. 3 Northwestern State Set for Sunday's Women's Tennis Final - Southland Conference
At 36, Roger Federer Becomes Oldest No. 1 In Tennis
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
World No. 1 Halep Joined By Past US Open Champions in 2018 Field | Long Island Tennis Magazine
2018 Australian Open: No. 1 Halep wins classic, will face Wozniacki in final - CBSSports.com
Top 5 WTA Upsets 2018 (No.1): Sasnovich shocks title favorite Kvitova in Wimbledon opener
Roger Federer will top tennis rankings after five-year absence - The Boston Globe
List of WTA number 1 ranked singles tennis players - Wikipedia
Rafael Nadal, Spanish professional tennis player ranked No. 1 in the world, practices on Arthur Ash court before the start of the US Open tennis championship at the USTA Billie Jean King
US Open Tennis 2018 Results: Tuesday's Singles Bracket Winners, Scores, Stats | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Ashleigh Barty and Katerina Siniakova secure WTA World No.1 rankings
2018 champion Kerber vs. No. 1 Barty in Wimbledon semifinals – Oneida Dispatch
ATP Rankings Movers: Rafael Nadal Returns To No. 1 | ATP Tour | Tennis
Throwback: When Roger Federer won the 2018 Rotterdam Open to become the oldest World No. 1
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
