Novak completed the 2016 season with a 65-9 W/L record and seven titles won, and finished year as no. 2 for the second time in his career.
Sunday’s contest between Novak and Andy Murray will be the first occasion in history that the year-end no.1 ranking is on the line at the title-match of the season finale.
The defending champion kept up the pressure in the race for the year-end no.1 ranking with a convincing 6-1, 6-2 win over Belgian David Goffin on Thursday.
Nole continued his bid for a fifth consecutive WTFs title with a 7-6 (6), 7-6 (5) win over Milos Raonic.
Novak won his opening match at the Barclays ATP World Tour Finals, rallying to beat Dominic Thiem 6-7(10), 6-0, 6-2 on Sunday.
The world’s biggest indoor tournament begins on Sunday, November 13, at the O2 Arena in London.
After two years and four months, and 122 consecutive weeks spent on top, Novak is back to no.2 in the ATP Rankings as of November 7.
Novak has suffered quarter-final exit at the BNP Paribas Masters on Friday after he fell to no.9 seed Marin Cilic 4-6, 6-7 (2).
Novak continued his quest for a fifth Paris Masters title with a 4-6, 6-2, 6-3 win over Grigor Dimitrov.
The reigning Paris Masters champion beat world no.34 Gilles Muller 6-3, 6-4 and next faces no.14 seed Grigor Dimitrov (Thursday).