"Having my dad there is a very good feeling," Tomic told reporters after the victory over his Spanish opponent.
"Obviously winning my first title here gives a lot of memories to me. I'm happy the way I played today. Having my dad there for the first time in a while, it's good.
"I know his ban will finish very soon, in a few months, and back to helping me. I'm happy. I played very good. Felt very good. I'm happy to be back playing like this."
Former taxi driver John Tomic has not watched his son play since he was banned last May from all ATP events, which includes next week's Australian Open, after he was charged with head-butting his son's former training partner Frenchman Thomas Drouet and breaking his nose.
He was convicted and sentenced to eight month's imprisonment by a Spanish court for assault last September though was not required to serve jail time because his sentence was under two years in length.
While he is banned from receiving accreditation, which entitles him into official areas, he was allowed to buy a ticket as a member of the public at the discretion of the tournament director.
"The ATP has banned John Tomic - as is public knowledge - which excludes him from getting credentials and being in other accreditable areas," Sydney International director Craig Watson told Australian media.
"There is nothing that prohibits the events agreeing to John being in public areas of the ground and I've agreed to allow that to happen."
Australian Open organisers have already said he would not be entitled to purchase a ticket for Melbourne Park, though the younger Tomic said that would not be a problem.
"Obviously he can't come in (at Melbourne)," Tomic said.
"But that's fine. I'll see him at home. If there is anything I need to hear, he'll tell me. It's very good.
"He's the one that you taught me to play like this. Spent hours with him that I probably won't spend with no one in my life.
"He knows me the best."
The lanky 21-year-old, who won his first ATP Tour title at Sydney last year, has taken Croatian Velimir Zovko on as his new co-coach while his father serves the remainder of the ban.
The ATP is expected to consider whether to lift the ban in May.
ATP Tour results
ATP Sydney - Round 1
Bernard Tomic (Australia) beat 8-Marcel Granollers (Spain) 6-3 6-0
Alexandr Dolgopolov (Ukraine) beat Edouard Roger-Vasselin (France) 6-3 0-0 (Roger-Vasselin retired)
Marinko Matosevic (Australia) beat Florian Mayer (Germany) 6-2 4-6 6-3
Albert Ramos (Spain) beat Sam Querrey (U.S.) 4-6 6-3 6-4
Blaz Kavcic (Slovenia) beat Jarkko Nieminen (Finland) 6-4 6-3
Radek Stepanek (Czech Republic) beat Samuel Groth (Australia) 6-7(6) 7-6(5) 6-2
Sergiy Stakhovsky (Ukraine) beat Carlos Berlocq (Argentina) 6-3 6-4
Nicolas Mahut (France) beat Ryan Harrison (U.S.) 7-6(2) 7-5
7-Marin Cilic (Croatia) beat Jan-Lennard Struff (Germany) 3-6 6-3 6-3
ATP Auckland - Round 1
Lu Yen-Hsun (Taiwan) beat Igor Sijsling (Netherlands) 7-5 7-6(7)
6-Benoit Paire (France) beat Michal Przysiezny (Poland) 6-4 6-2
Guillermo Garcia-Lopez (Spain) beat 8-Robin Haase (Netherlands) 4-6 7-5 7-6(4)
5-Philipp Kohlschreiber (Germany) beat Pablo Carreno (Spain) 6-2 3-6 7-5
Roberto Bautista (Spain) beat Daniel Gimeno-Traver (Spain) 6-1 3-6 6-4
Donald Young (U.S.) beat Federico Delbonis (Argentina) 7-5 6-2
Lukas Lacko (Slovakia) beat Jose Statham (New Zealand) 6-3 6-1