Throwback: When Roger Federer won the 2018 Rotterdam Open to become the oldest World No. 1
Zverev: 'I'm not thinking about being world no. 1 or ending 2018 there'
Top 10 of '18, No. 1: Djokovic tops Nadal in two-day Wimbledon classic
WTA Rankings: Simona Halep finishes as World No 1 for second year running
Roger Federer reclaims No. 1 ranking by reaching Stuttgart final
Marin Cilic desires to win Grand Slam and become No. 1 in 2018
No. 1 Barty Beats 2018 Champ Kerber To Reach Wimbledon Final
New world No.1 Roger Federer wins Rotterdam Open - Vanguard News
U.S. Open 2018: No. 1-seed Simona Halep upset in 1st round by No. 44 Kaia Kanepi – The Denver Post
Rafael Nadal: No. 1 headed to 2018 Australian Open
2018 champion Angelique Kerber, No. 1 Ash Barty into Wimbledon semifinals | Sports News,The Indian Express
Federer marks No.1 ranking with 98th title in Stuttgart - EgyptToday
Djokovic Completes Remarkable Return To No. 1 | ATP Tour | Tennis
Novak Djokovic begins No. 1 charge as Roger Federer learns first Shanghai opponent | Metro News
At 36, Roger Federer Becomes Oldest No. 1 In Tennis
No. 1 Halep wins suspended match, advances in Cincinnati - Sportsnet.ca
Djokovic Presented Year-End ATP World Tour No. 1 Trophy At Nitto ATP Finals - Tennis TourTalk
Tennis: Medvedev first man in 18 years other than 'Big 4' to be world No 1 - The Week
US Open Tennis 2018 Results: Tuesday's Singles Bracket Winners, Scores, Stats | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
2018 champion Kerber vs. No. 1 Barty in Wimbledon semifinals - ABC News
:focal(1211x566:1213x564)/origin-imgresizer.eurosport.com/2018/01/18/2248178-46862350-2560-1440.jpg "World no.1 Simona Halep makes light work of Eugenie Bouchard in second round - Eurosport")
World no.1 Simona Halep makes light work of Eugenie Bouchard in second round - Eurosport
Tennis finishes first meet of season - Northwest Missouri State Athletics
World No. 1 Halep Joined By Past US Open Champions in 2018 Field | Long Island Tennis Magazine
Tennis: 4 contenders for the year-end No. 1 World Ranking
