Stan Wawrinka - Wikipedia
Alexander Zverev - Wikipedia
2017 ATP World Tour - Wikipedia
ATP-Weltrangliste: Große Sprünge nur auf den hinteren Rängen, Djokovic stellt Rekord ein · tennisnet.com
2017 Men's Tennis ATP Rankings | ESPN
2017 Men's Tennis ATP Rankings | ESPN
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
Number 1 in Men's Tennis the longest? using R | by Ankit Nagarsheth | Medium
ATP Rankings July 22, 2013: No changes in rank for top 5 – Rafael Nadal Fans
2017 Men's Tennis ATP Rankings | ESPN
ATP Weltrangliste: Daniil Medvedev pirscht sich an Novak Djokovic ran | myTennis News
2017 Men's Tennis ATP Rankings | ESPN
Die besten Herren 2017 – Blick in die Glaskugel · tennisnet.com
Official Site of Men's Professional Tennis | ATP Tour | Tennis
Nadal, Federer In Top 2 Year-End Emirates ATP Rankings For First Time Since 2010 As Five New Players Finish Season In Top 10 | ATP Tour | Tennis
2017 Men's Tennis ATP Rankings | ESPN
Djokovic, Nadal, Federer In Top 3 Year-End ATP Rankings For Record 7th Time, First Time Since 2014 | ATP Tour | Tennis
Thiem Returns To Top 4, Mover Of The Week | ATP Tour | Tennis
2017 Top 10 Year-End ATP Rankings
2017 ATP World Tour - Wikipedia
2017 Men's Tennis ATP Rankings | ESPN
Emirates ATP Rankings Movers 17 April 2017 | ATP Tour | Tennis
History | ATP Tour | Tennis
Nadal, Djokovic and Federer top year-end ATP Rankings for record eighth time
