Novak will begin title defence in Indian Wells against Marcos Baghdatis on Saturday at 19.00 local time (Sunday at 03.00 CET).
Novak and Nenad Zimonjic beat Franko Skugor and Marin Draganja 6-3, 6-4, 6-1 to give the 2010 Davis Cup winner an unassailable 3-0 lead in the tie. Serbia will play against Argentina (away) in quarter-final (17-19 July).
Novak and Viktor both won on the opening day at Kraljevo Sports Centre to give Serbia a 2-0 lead over Croatia going into Saturday’s doubles.
Kraljevo, Day 1: 13.00 CET Novak Djokovic (SRB) vs Mate Delic (CRO), followed by Viktor Troicki (SRB) vs Borna Coric (CRO).
Novak will lead the 2010 Davis Cup champion Serbia in Kraljevo (6-8 March). He will be joined by Troicki, Krajinovic and Zimonjic.
Novak was attempting to win his 50th career title and second in 2015. Roger Federer won 6-3, 7-5 to take his seventh Dubai crown.
Novak will attempt to clinch his 50th tour-level title and his second of the year, when he takes on second seed Roger Federer on Saturday.
Nole needed just 49 minutes to beat Marsel Ilhan of Turkey 6-1, 6-1 in quarter-final action on Thursday.
Novak stayed on course for a fifth Dubai Duty Free Tennis Championships crown after ousting Andrey Golubev 6-1, 6-2 on Wednesday.
The top seed opened his bid for a fifth Dubai Duty Free Tennis Championships title with a 6-4, 6-4 victory over Vasek Pospisil on Tuesday.