Novak took part in a symbolic march in Monte Carlo, marking the 25th anniversary of the Convention on the Rights of the Child and supporting Universal Children’s Day.
Novak will lead 2010 champion Serbia in a home Davis Cup by BNP Paribas first round tie against Croatia (March 6-8).
The 2014 season is completed with the Barclays ATP World Tour Finals in London. Nole is on top with 11,510 points.
Novak claimed his third consecutive Barclays ATP World Tour Finals title as Federer withdrew ahead of final due to a back injury.
Novak is one win away from defending his season finale title after he beat Kei Nishikori of Japan 6-1, 3-6, 6-0 in 87 minutes at the O2 Arena.
With a 6-2, 6-2 win over Tomas Berdych on Friday, Nole has clinched year-end no.1 spot for the third time in four years!
Novak continued his bid for a third consecutive WTFs title in emphatic fashion. He beat Stanislas Wawrinka 6-3, 6-0 in just 65 minutes.
Nole beat eighth seed and US Open titlist Marin Cilic 6-1, 6-1 in just 56 minutes at the Barclays ATP World Tour Finals on Monday.
The world’s biggest indoor tournament begins on Sunday, November 9, at the O2 Arena in London, and will be played until November 16.
Novak won the BNP Paribas Masters for the third time on Sunday as he defeated Milos Raonic 6-2, 6-3 in the final.