Alex de Minaur will continue his tennis comeback representing Australia at the Davis Cup in Adelaide in March, while James Duckworth will make his debut.
Nick Kyrgios, John Millman and Jordan Thompson round out the five-man team.
Since picking up an injury at the ATP Cup in January, de Minaur was forced out of the Adelaide Open and the Australian Open.
The world number 25 is making his return at the Mexico Open this week, taking on Serbia's Miomir Kecmanovic in the first round.
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“I’m feeling great and looking forward to getting back on court with all the Aussie team,” De Minaur said.
“It’s always an amazing opportunity to represent your country, and we had a pretty good start to the year in Brisbane and Sydney at the ATP Cup.
"All the boys did an amazing job and it will be great to get back together and hopefully get the win over Brazil.”
After a series of impressive performances over the past 12 months, Duckworth has finally earned a national team call-up.
Duckworth earned his first appearance in an ATP Tour level semi final in Pune in early February, before winning a Challenger event in Bengaluru a week later.
He rose to a career-high ranking of 71 in the world, which was more than enough to see him selected for Australia.
“I’m really excited and honoured to be selected. Getting the opportunity to represent my country is extremely special and is something I will always remember,” Duckworth said.
“I’ve been part of a few ties before and I love the lead up week. Being able to train and spend time with all the boys as a team is always a lot of fun and I can’t wait to get to Adelaide.”
Davis Cup captain Lleyton Hewitt was happy with the team available.
“We’re pleased we can field such a strong team for the Davis Cup tie against Brazil especially with Alex de Minaur back to full health after his injury during the summer,” Hewitt said.
“Nick Kyrgios, John Millman and Jordan Thompson have shown over the past couple of months they are competitive with the top players and it’s great to see them continue to produce results.
“And we’re delighted to select James Duckworth as part of this team. Ducks has had a long, hard road but his form in recent weeks and in the past 12 months has been impressive.
“We couldn’t be happier to give him this opportunity he’s worked so hard for.”
The winner of the tie will advance to the Davis Cup finals in Madrid in November.
The tie will consist of four singles matches and one doubles match all played over best-of-three sets.
The singles rubbers will be played on Friday, March 6, with the doubles on the afternoon of Saturday, March 7 followed by the two reverse singles matches.