The controversial and explosive 24-year-old will end an 18-month absence from the Australian team when the Davis Cup restarts in Madrid later this month.

Kyrgios cut short his individual season to ensure he had recovered from a collarbone injury in time to be available for selection in Hewitt's squad.

Speaking for the first time since the team was announced, Kyrgios said Australia can "do some damage" after being left out of the squad earlier this year because he failed to meet performance and behavioural standards

"It feels good to be back in the team. My behaviour was always a bit of a question mark but I love being in a team environment," Kyrgios said in Canberra on Thursday.

"I'll do whatever it takes for the team to have success. I'll stand out there while the guys are practising and I'll do whatever Lleyton needs me to do but again, my favourite time of the year is the Davis Cup for sure.

"Obviously when I wasn't playing [Davis Cup], it wasn't because I didn't want to play. There were just question marks with unpredictable things I was doing so, I just had to prove to Lleyton again that I could bring that consistency to the team and be positive.

"For me to best prepare for the Davis Cup, I had to call my year. I had to come home, and with the probation and stuff, it was best to come home to refresh and get my body right for Davis Cup."

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Kyrgios and Davis Cup teammate Jordan Thompson were at Gold Creek School on Thursday, handing out racquets to children as part of the Hot Shots junior program.

He was upbeat and happy despite injury prematurely ending his individual season, returning to the capital to recover from a collarbone problem.

He is also serving a six-month probation period after accusing ATP officials of being corrupt at the US Open in August.

The world No. 30 will team up with Thompson, Alex de Minaur, John Millman and John Peers in Australia's squad.

"Right now [I have the right mindset], but that can change. Having [Thompson] come down from Sydney, that's awesome for me," Kyrgios said.

"I think our team has a lot of depth ... I'm looking forward to going to Madrid. We have a real shot at doing some damage there."

Thompson trained with Hewitt for two days in Melbourne before coming to Canberra to spend time with Kyrgios this week. The Sydney-sider has played with Kyrgios since childhood and says he flourishes in a team environment.

"I had been hoping he'd be back in the squad for a long time," Thompson said.

"He's proven he's willing to be back and put the effort in, it's nothing but positive.

"Tennis is an individual sport but playing the Davis Cup is a team format. I know Nick, he loves basketball, this is his basketball. He gets to really embrace it."

Australia have been placed in Group D alongside fourth seeds Belgium and Colombia, and will face either the United States, Italy or Canada in the quarter-finals if they top the pool.