Extending his winning streak to 17 matches in 2015, Novak Djokovic overcame stiff resistance from Czech Tomas Berdych to win the Monte-Carlo Rolex Masters tournament that concluded in the Principality of Monaco on Sunday. Djokovic thus became the first player to win every ATP World Tour Masters 1000 event of the 2015 tennis season. The victory for the 27 year old Serb at Monte-Carlo came close on the heels of the Double at the Indian Wells-Miami tournaments in the United States. With 23 Masters 1000 trophies, Djokovic has drawn level with Roger Federer at the second place for most such victories but both Djokovic and Federer are behind Rafael Nadal, who has notched up 27 victories at Masters 1000 level. The Serbian world no.1 has been sensational