Nick Kyrgios overcame a shaky start to down Sam Querrey 7-6(4) 6-3 6-4 and send Australia into the Davis Cup semi-finals with a 3-1 victory over the United States in Brisbane on Sunday.

Novak Djokovic spearheads Serbia's bid to reach the Davis Cup semi-finals for the first time since 2013 and reboot a career which has stalled since his history-making French Open victory.

Australia's number two Bernard Tomic will be absent from this week's Davis Cup quarter-finals but the United States will still have a fight on their hands in Brisbane due to the impressive form of Nick Kyrgios, U.S. team captain Jim Courier said.

Novak Djokovic and Nick Kyrgios hope the Davis Cup heals the wounds of their painful Australian Open exits this weekend when they will be the only two men in the top 15 taking part.

Argentina lift their first Davis Cup title after Juan Martin Del Potro and Federico Delbonis win Sunday's reverse singles to complete the South American nation's spectacular comeback in a 3-2 victory over hosts Croatia in the final.

Argentina was in sight of a first Davis Cup final since 2011 after taking a 2-0 lead over titleholder Britain thanks to singles wins

Rafael Nadal describes Stan Wawrinka as "super dangerous" after he clinched the US Open to claim his third Grand Slam title

Teenager Borna Coric complete an unlikely comeback for Croatia as the small Balkan nation beat the United States 3-2 in a Davis Cup quarter-final in Oregon.

Wimbledon champion Andy Murray will miss Britain's Davis Cup quarter-final clash against Serbia with captain Leon Smith naming Kyle Edmund and James Ward as his two singles players on Wednesday.

More players reveal match-fixing approaches on Tuesday as the Australian Open Grand Slam tournament came under close scrutiny following claims that corruption in tennis was widespread.