Nick Kyrgios sends brutal reminder to Goffin

Nick Kyrgios has sent a brutal reminder to Belgian No.1 David Goffin ahead of his Davis Cup reverse singles rubber on Sunday night.

The pressure is on Goffin to break that duck after John Peers and Jordan Thompson's straight sets doubles win on Saturday gave Australia a 2-1 lead and put Australia on the brink of a first final in 14 years.

Victory for Kyrgios would set up a home decider in November against either Serbia or France, but Goffin has never defeated the world No.20 in three previous encounters.

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The Aussie said he was looking forward to facing Goffin and believes he is serving as well as he has all year after hurling down 34 aces against Darcis in Friday's five-set success.

"It's going to be tough, but he's got to make some adjustments," Kyrgios said.

"He's never beaten me before. He doesn't know what that feels like.

"I am going to have that at the back of my mind. I am serving well and that is the best part of my game.

"But at the same time it's a different match. David hardly hits any slices but it's all about match-ups and I feel confident."

Kyrgios was part of the excited bench during the doubles. Pic: Getty

After watching Peers and Thompson win the crucial doubles rubber, Davis Cup captain Lleyton Hewitt backed Kyrgios in to secure the tie.

"They are two quality players going head-to-head in what will be a tough battle for their country," Hewitt said.

"Nick will be ready, come game time. No doubt about it."

Should he lose, all attentions will switch to John Millman to get his country over the line against world No.77 Steve Darcis - who beat Carsten Ball in a similar situation seven years ago in a World Group playoff in Cairns.

Hewitt confirmed Millman will definitely play in the second rubber, despite a sapping three-and-a-half hour encounter against Goffin on the opening day.

The captain has the option of switching players in the squad, but said it was unlikely he'll look to Thompson who has only spent 90 minutes on court.

"John played pretty well yesterday, he did a lot of things right," he said.

"The boys did a lot of hard work last week and will be pretty happy with their bodies."

Watch highlights from Kyrgios's first singles win:

Hewitt was part of the sides that lost to Belgium in both 2007 and 2010 but said there are no lingering memories of Darcis' memorable win for his country seven years ago.

"Hopefully it will be a different result, but there is a lot more on the line today than then.

"Both of their players are tricky customers. I have the upmost respect for them and won't be taking them lightly."

The former world No.1 was full of praise for Thompson and Peers who dominated their match against Ruben Bemelmans and Arthur de Greef from the start to win 6-4 6-3 6-0.

"It was very clinical, setting the tone from the word go," he said.

"The boys were up and about early and executed their game plan brilliantly."

Belgium captain Johan Van Herck insisted his side will fight to the bitter end to keep alive their hopes of a first ever Davis Cup title.

"We lost a battle today but not the tie," he said.

"There are still two matches to win. Matches that we can win."

Watch Peers and Thompson speak after the doubles win:

with AAP