Aces wild as Kyrgios draws Isner in Davis Cup battle

One more win will send Australia through to a semi-final date with Belgium or Italy in September.

Sock had played nine sets of singles and doubles on the previous two days and Australia suspected Querrey, 29, would be given his first match in the quarter-final as Kyrgios's opponent.

"Another Australian big server, Sam Groth, will team up with John Peers to take on Sam Querrey, who is no slouch in the service department, and Steve Johnson in tomorrow's doubles before the reverse singles on Sunday".

"I just tried to wear him down, and I thought I was fit enough to do that", Thompson said.

"I think we can win it".

"I couldn't be prouder of my boys", said Australia captain Lleyton Hewitt.

Australia, who lost to the U.S. in the first round previous year, will now turn their attention to Sunday's reverse singles as they bid to secure a place in the last four, with Kyrgios facing Sock before Thompson takes on John Isner.

Any hope of an Italy comeback were snuffed out by Goffin though who was ruthless against Lorenzi as he took his record to 13 wins in 14 Davis Cup singles matches.

Spain avoided a whitewash in Belgrade thanks to Albert Ramos-Vinolas' 6-2 6-1 dead-rubber victory over Nenad Zimonjic after Serbia's Dusan Lajovic had fought back to beat Jaume Munar 2-6 6-1 6-4 earlier in the day.

The American number one looked the more risky in the third but Thompson held on to force a tiebreak, gaining a vital break before taking the set when Sock double-faulted.

Kyrgios said it was a relief to have won despite the added expectation generated by his performances since his shocking second-round loss at the Australian Open, which has proved a turning point in his career.

He said that during this run of good form he had always had one eye on the Davis Cup.

Kyrgios is due to face Sock in Sunday's opening reverse singles rubber, although Hewitt is anticipating another curve ball from the USA after the world number 15 was a late replacement for Sam Querrey in the doubles.

Querrey, who has beaten Novak Djokovic at Wimbledon has a big-serving game based on power, and although it's a little less well rounded than that of Sock's, he beat Kyrgios only a few weeks ago.

With Australia 2-1 up going into the final day, Kyrgios won 7-6 (7-4) 6-3 6-4 to give the hosts an unassailable lead in Brisbane. Australia has not made the final of the Davis Cup since the last time they won it in 2003.

  • Julie Sanders