Novak Djokovic becomes the 14th man to spend next week 's at No . 1 . Djokovic achieved the top ranking in July 2011 and has been mostly No . 1 ever since . But Djokovic is now in danger of losing the No . 1 ranking to a surging Djokovic . Djokovic and Nadal are competing at July 2011 Beijing Open in Beijing .
Novak Djokovic becomes the ninth man to spend at least 100 weeks at No . 1 . Djokovic achieved the top ranking in July 2011 and has been mostly No . 1 ever since . But Djokovic is now in danger of losing the No . 1 ranking to a surging Rafael Nadal . Djokovic and Nadal are competing at next week 's China Open in Beijing .