Team captain Lleyton Hewitt named the combustible pair in a six-man squad which will be reduced to four for the Sept. 16-18 grass-court tie at Sydney's Ken Rosewall Arena.
World number 19 Tomic was dumped out of the first round at Flushing Meadows by 72nd ranked Bosnian Damir Dzumhur and slapped with a $10,000 fine for firing lewd comments at a heckler in the crowd.
Kyrgios, ranked 16 in the world, retired hurt when trailing in his third round match against Ukraine's Illya Marchenko, earning a stinging rebuke from four-times champion John McEnroe who challenged the 21-year-old to quit the sport if his heart wasn't in it.
Hewitt on Monday said Kyrgios was a doubt for the tie but would be given every chance to recover from a hip injury.
A day later, the former world number one said in a media release: "... all the boys are fired up and ready to go out and get the win for Australia."
Kyrgios was a late withdrawal from the World Group first round tie against the United States in Melbourne in March, which caused a rift with Tomic who played in the 3-1 defeat to the visitors.
Tomic publicly questioned Kyrgios's pull-out due to a 'flu-like illness', prompting Kyrgios to fire back on Twitter: 'Just don't expect me to have your back anytime soon."
Kyrgios's withdrawal from the U.S. Open continued to rumble on Monday, with high-profile Australian coach Roger Rasheed questioning why he had played doubles at Flushing Meadows if carrying an injury.
Rasheed suggested Kyrgios's lack of a coach was costing him.
"A coach would definitely stream all that back. Strip it all back and really make it quite simplistic for him," the outspoken 47-year-old told Sky Sports.
Kyrgios gave Rasheed's comments short shrift.
"John McEnroe takes a stab, I understand," he tweeted on Tuesday. "Roger Rasheed haha maybe not so much. I got to ur career high when I was 18... ease up champ."
(Reporting by Ian Ransom; Editing by Amlan Chakraborty)
