U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
Winning the tournament and being No. 1 again' – Carlos Alcaraz reveals goal ahead of Indian Wells | Tennis Buzz | capjournal.com
Explainer: How tennis rankings actually get it right
2018 Novak Djokovic tennis season - Wikipedia
Hounds Make History with First Ever #1 Ranking - UIndy Athletics
2018 Australian Open: No. 1 Halep wins classic, will face Wozniacki in final - CBSSports.com
Australian Open 2018: Djokovic, Federer win; Muguruza out - Sports Illustrated
Novak Djokovic to lose men's world No. 1 rank to Daniil Medvedev | Sporting News
Novak Djokovic Clinches Record Seventh Year-End No. 1 In FedEx ATP Rankings | ATP Tour | Tennis
Wozniacki overtakes Halep to return to WTA World No.1
No 1 Swiatek upset by Krejcikova in Dubai final | AP News
Kaia Kanepi sends No. 1 Simona Halep home in stunner - Official Site of the 2023 US Open Tennis Championships - A USTA Event
Gauff becomes ITF Juniors world No. 1
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
2018 champion Kerber vs. No. 1 Barty in Wimbledon semifinals – Oneida Dispatch
World no. 1 junior Chun Hsin Tseng eyes Grand Slams history - Official Site of the 2023 US Open Tennis Championships - A USTA Event
Rafael Nadal and Roger Federer seeded 1-2 for Australian Open
Roger Federer retiring from pro tennis at age 41: 'The tires finally wore out' - oregonlive.com
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
Djokovic Completes Remarkable Return To No. 1 | ATP Tour | Tennis
List of ATP number 1 ranked singles tennis players - Wikipedia
