THE ATP World Tour Finals is the last event on the ATP calendar for 2018 and the market suggests it will be Novak Djokovic and Roger Federer who meet in the decider. Djokovic has won the tournament on five occasions and he is a dominant $1.62 favourite to win for the sixth time. Standing in his way is the only player who has already won the event six times – the great Federer. The Swiss Master is $3.75 to win the tournament for the first time since he beat Jo-Wilfried Tsonga in the 2011 edition, but his recent record against Djokovic is poor. Djokovic has won eight of the past 10 matches between the pair, including the past four, and he has been in peerless form in the second half of the season. Alexander Zverev is on the third line of betting at $11 from Marin Cilic ($13), Kei Nishikori ($15), Kevin Anderson ($21), Dominic Thiem ($26) and John Isner ($29).