Australia through to ATP Cup semi-finals

Australia have roared into the ATP Cup semi-finals with a rollicking doubles win from shock first-time pairing Alex de Minaur and Nick Kyrgios.

In a daring selection gamble, Australian captain Lleyton Hewitt replaced doubles specialists John Peers and Chris Guccione with his two singles spearheads after an inspired Dan Evans levelled the tie for Great Britain with an epic victory over de Minaur.

But a lion-hearted de Minaur rebounded from his three-hour, 22-minute singles loss to pull off a rousing 3-6 6-3 18-16 triumph with Kyrgios over two-times grand slam doubles champion Jamie Murray and Joe Salisbury.

The thrilling triumph, after saving four match points in the super-tiebreak, almost raised the roof at the new-look Ken Rosewall Arena and fired Australia into a semi-final showdown on Saturday night with Rafael Nadal's Spanish Davis Cup champions or Canada.

Staring down their fourth match point, de Minaur and Kyrgios each rifled spectacular backhand return winners before Kyrgios closed out the contest with an undeliverable serve.

A jubilant Kyrgios carried de Minaur off court to celebrate with the Australia's courtside box.

Revelling in the team environment, Kyrgios had given Australia a flying start with an emphatic 6-2 6-2 win over Cameron Norrie in Thursday's opening match before Evans denied de Minaur 7-6 (7-4) 4-6 7-6 (7-2) in the match of the tournament.

But few cook have predicted the drama to follow with de Minaur and Kyrgios never having paired up before.

Despite their proven singles prowess, neither are doubles mugs.

After the match, De Minaur took his hat off for Kyrgios, giving him full credit for their victory.

The young Aussie stated Kyrgios "carried me out there," humorously asking his teammate to confirm the gesture.

"This guy over here, he just blatantly carried me out there," De Minaur said.

"Is that true, Nick?"

Kyrgios responded, declaring the young Aussie just needs some guidance when trying to remain positive.

"Not at all, he's just needs a bit of guidance.

"He just gets pretty down himself really easily and I just try to keep him positive as much as I can, especially after that unbelievable singles performance where he just came up short.

"I just try to bring as much energy as I could."

Kyrgios declared he will be sipping away at the "red win" after the gruelling tiebreak.

"It was probably the most stressful tiebreak I've ever played in my life.

"I'm definitely having a bit of red wine tonight."

De Minaur played 11 doubles tournaments last year.

He partnered Peers to knock off Jack Sock and Leander Paes, both multiple grand slam doubles champions, as well as the top-ranked pairing of Robert Farah and Juan Sebastian Cabal to make the semi-finals in Washington.

Kyrgios also contested 11 doubles events in 2019, his most notable win a victory with Sock over Rafael Nadal and Stefanos Tsitsipas.

But Thursday's win was another level, given the high stakes and massive $22 million prize money on offer at the inaugural ATP Cup.

Russia will face Argentina in Thursday night's second quarter-final.

Spain and Belgium clash on Friday night, after the Novak Djokovic-led Serbia take on Canada in that day's first quarter-final.