Claim: Novak Djokovic competed in the finals at all of the nine ATP Masters 1000 series of contests.
Evidence: Djokovic 's records include breaking the single-season record with six masters titles in 2015 , winning 31 consecutive ATP World Tour Masters 1000 series matches , playing in the finals at all nine ATP Masters 1000 tournaments -LRB- shared with Roger Federer and Nadal , and being the only player to win eight of the nine events -LRB- and at least twice -RRB-.