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It's a big day in the men's draw, with Andy Murray, Roger Federer and Stan Wawrinka in action, while Angelique Kerber takes on Coco Wanderweghe on the women's side.

Politics is the new black for big investors, with economics as a driver of market sentiment becoming somewhat passé.

Richie Porte hopes he and Caleb Ewan will light up this year's Tour de France.

Daria Gavrilova can pinpoint the moment where she saved her Australian Open campaign.

A group of doctors calls for alcohol sponsorship of cricket to be banned and the broadcasting authority to plug a loophole that allows sport progams to show alcohol ads when children are most likely to be watching television.

Daria Gavrilova wins a three-set marathon against Switzerland's Timea Bacsinszky to advance to the fourth round of the Australian Open for the second-straight year.

The Sydney Sixers claim a last-gasp semi-final berth, defeating the Melbourne Stars by three wickets in the last match of the BBL regular season.

Rafael Nadal is through to the fourth round of the Australian Open but he did it tough, out-lasting German teen Alexander Zverev in five sets.

Shaun Marsh finds form with the bat to help steer the Perth Scorchers to a home BBL semi-final with a seven-wicket win over the Hobart Hurricanes.

The NRL future of Wests Tigers forward Kyle Lovett is in limbo after being charged with drug offences.

Team BMC's Richie Porte remains unstoppable on Willunga Hill, taking the Tour Down Under stage for a fourth straight year and all but seal victory.

Tennis legend Andre Agassi says Nick Kyrgios's next coach must accept the mercurial young star warts and all and delve deep into his tortured soul.

The new US administration of President Donald Trump says its trade strategy to protect American jobs would start with withdrawal from the 12-nation Trans-Pacific Partnership (TPP) trade pact.

Post-inauguration women's marches in Australia and New Zealand launch a global human rights event expected to attract over 2 million people worldwide.

Serena Williams sees off fellow American Nicole Gibbs in straight sets to book her spot in the Australian Open fourth round.

Ashleigh Barty wants the media to move beyond talk of comebacks, as the former code-swapper reflects on a solid Australian Open run.

Former world number ones, Serena Williams and Rafael Nadal, French entertainer Gael Monfils and local hope Daria Gavrilova are among the highlights on day six at the Australian Open.

Some of Australia's most high-profile medicinal cannabis advocates band together to launch a new campaign for better access to the drug, saying current legislation is leaving those needing it facing a "catastrophic event".

The Historical Institutional Abuse inquiry in Northern Ireland recommends children who were transported to Australia in the 1940s and '50s be given compensation for the trauma they suffered.

A Chinese-Australian man running for Pauline Hanson's One Nation in the West Australian election defends the party leader's comments, saying her "views are not reflective of what they are today".

US foreign policy will become unpredictable under President Trump and Australian should avoid "complacency" on national security, researchers say.

A rampaging Roger Federer delivers a stunning reminder of his class at the Australian Open with a crushing win over Tomas Berdych.

The Heat needed 18 off the last six balls to beat the Renegades but lost in a final over that featured two sixes, three wickets and four wides.

Sydney FC stretch their unbeaten A-League streak to 16 games, notching their 12th win and 10th clean sheet to climb eight points clear at the summit.