Djokovic reaches 100th week at No.1 in ATP rankings

Serbian World No.1 Novak Djokovic has become the ninth player to mark his 100th week atop the ATP tennis rankings. Dojokovic, who first reached No.1 in July 2011, joined the likes of Agassi(101 weeks), Nadal(102) and Federer(302) by achieving the milestone. His bid to finish at No.1 for a third straight year is under serious threat this year from Nadal.