Live ATP Rankings: Rafael Nadal is 1500 points clear of Roger Federer

Tennis - The Spaniard has to beat Dominic Thiem in the quarter-final of the US Open to secure No. 1 position

Who has a mental advantage over Roger Federer, Rafa or Novak? - Quora

Who is the best volleyer between Nadal and Federer? - Quora

Champion of champions': Roger Federer to retire from tennis, Sports News - AsiaOne

Roger Federer says he is retiring from professional tennis at age 41

Roger Federer - Wikipedia

The greatest male tennis player of the last 50 years: the fans' verdict, Tennis

Ranking the players with the most end-of-season ATP points since 2009: Novak Djokovic's dominant year stands out

ATP Rankings: Djokovic nears year-end No.1, Shapovalov out the top 100

ATP Rankings: Roger Federer closes the gap to Rafael Nadal. Novak is sixth

Who is 'the best' in tennis now? Nadal or Federer? Why? - Quora

Roger Federer brings down curtain on his career with a defeat, but still dazzles alongside longtime friend and rival Rafael Nadal