It could have been worse for Kyrgios, a former Open quarter-finalist who has slipped to 50th in the rankings, and Tomic, three-times a second-week challenger at the season's first major.
"It is great to see him back out here as I know he was going through some rough times", Kyrgios.
"He can make a run at the Australian Open, for sure".
With his silky hands and superb touch, Tomic broke for a 3-1 lead and then steamed through the first set.
"We don't want to hurt ourselves and go too hard, because we've got to play in five days, the important one", said Tomic.
"I just wanted to get out here today and hit some serves, get that match preparation, face some serves", he said.
The Australian's ranking is up to No. 85 in the world just ahead of his home Slam, while Kyrgios has dipped down to No. 51.
The 27-year-old Halep will be at the Australian Open next week in Melbourne without a coach after parting ways with Australian mentor Darren Cahill, who can longer commit to Halep due to family reasons.