2018 Australian Open: No. 1 Halep wins classic, will face Wozniacki in final - CBSSports.com
2018 champion Kerber vs. No. 1 Barty in Wimbledon semifinals
Mountain View girls tennis looks solid early on - The Columbian
Throwback: When Roger Federer won the 2018 Rotterdam Open to become the oldest World No. 1
US Open 2018: British No 1 Kyle Edmund knocked out in first round after struggling with cramp | The Independent | The Independent
Serena Williams gets No. 17 seed at 2018 U.S. Open - UPI.com
Tennis Rankings: Novak Djokovic displaces Roger Federer as World No 2; Simona Halep to finish as World No 1 | Sports News,The Indian Express
List of WTA number 1 ranked singles tennis players - Wikipedia
Zverev: 'I'm not thinking about being world no. 1 or ending 2018 there'
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
US Open Tennis 2018 Results: Tuesday's Singles Bracket Winners, Scores, Stats | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
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
Roger Federer will top tennis rankings after five-year absence - The Boston Globe
At 36, Roger Federer Becomes Oldest No. 1 In Tennis
Impressive Stretch Of Tennis For British No. 1 Kyle Edmund
ZooTennis: A Look at First ITF Junior Rankings of 2018; Quarterfinals Set at Los Angeles Futures; De Minaur Beats Mmoh to Reach ATP Brisbane Semifinals
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
List of ATP number 1 ranked singles tennis players - Wikipedia
Roger Federer reclaims No. 1 ranking by reaching Stuttgart final
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
Djokovic Completes Remarkable Return To No. 1 | ATP Tour | Tennis
ATP Rankings Movers: Rafael Nadal Returns To No. 1 | ATP Tour | Tennis
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
Swiatek wins easily, but knows who's No. 1; Nadal bloodied | AP News
Karolina Pliskova Gets the Opponent She Craves: Serena Williams - The New York Times
World No. 1 Halep Joined By Past US Open Champions in 2018 Field | Long Island Tennis Magazine
