"But we want to be in a position where Stolts (Jason Stoltenberg) and I and Tony Roche can make tough decisions because we want guys that are playing well and putting their hand up to play for our country". Australia has a slight edge given their team, but playing at home on their choice of surface (clay) will be huge for Belgium.
It will be the fifth meeting between the two nations.
The last time Australia reached the final, Lleyton Hewitt, the current team captain, was in his prime and fittingly, he will oversee the country's best chance of adding to its 28 titles in over a decade.
The world No.12 was made to work hard for his victory by the 185th-ranked Queenslander, who was only called into the team by Hewitt on Thursday.
Queensland's John Millman will open the first day of play against world No.12 David Goffin in the blockbuster Davis Cup semi final between Australia and Belgium this weekend.
In the other last-four clash, France and Serbia are also locked at 1-1 after respective wins for Jo-Wilfried Tsonga and Dusan Lajovic.
In the first round of the Davis Cup, Kyrgios and Australia faced off against the Czech Republic in Kooyong, Australia.
Doubles stars John Peers and Jordan Thompson are in action overnight (NZ time) when they take on Ruben Bemelmans and Arthur De Greef.
Belgian's medical team have been working round the clock to ensure Goffin's presence after the Belgian star injured his left knee at the US Open.
A huge net cord at break point down went the way of Kyrgios at the start of the decider and, perhaps sensing it was his day, the Australian showcased his talent - encapsulated with a double-handed backhand victor with both feet off the floor en route to a gutsy victory.
World No.20 Nick Kyrgios will take on Steve Darcis in the second singles match on day one.
In April, Kyrgios, nearly singlehandedly, led Australia past Team USA in the World Group quarter-final of the 2017 Davis Cup.
In a wide-ranging piece he wrote for the newly launched Players Voice, Kyrgios offered up his opinion on Tomic's future and said "a lot has changed" since he was good friends with the 24-year-old. At the Rio 2016 Olympics, winning his opening match 6-0 6-0, the first man to do so.
Despite his strong form on the world stage, Peers was overlooked by a succession of Davis Cup captains until Hewitt took over and gave him his debut against the U.S. past year.
Darcis finally found a way to return the Kyrgios serve and broke in the second game of the second set and held on to level the match.
Kyrgios, who helped Australia beat the United States in the quarters, was picked by Hewitt despite his first round exit at Flushing Meadows.