Australian Open

Injured Nadal out of Aus Open

Former US Open champion Cilic produced a hugely impressive display on Rod Laver Arena, his stinging, flat forehands a particularly potent weapon throughout a contest that was brought to a premature end after three hours and 47 minutes.

However, the Croatian was significantly aided by a clear deterioration in the fitness of Nadal, whose movement was compromised after he called for a medical timeout in the fourth set.

Chung shocks Djokovic to advance

Former world No 1 Djokovic, who has been playing with a sleeve over the troublesome elbow that sidelined him for six months, paid the price for a lack of competitive tennis as he suffered a 7-6 (7-4) 7-5 7-6 (7-3) defeat to relentless 21-year-old Chung.

Meanwhile, unheralded Sandgren added to his earlier victory over 2014 champion Stan Wawrinka by crushing fifth seed Dominic Thiem's hopes in five sets.

Nadal marches on in Melbourne

World No 1 and top seed Nadal took the opener before dropping a set for the first time in the tournament as 24th seed Schwartzman levelled the contest via a second set tie-break.

However, it was the Spaniard who claimed the quarter-final place on offer, closing out the match, despite typical belligerence from his Argentine opponent, with a 6-3 6-7 6-3 6-3 victory.

Also into the last eight is world No 3 and ATP Finals winner Grigor Dimitrovwho beat home favourite Nick Kyrgios in four sets.

Halep survives after Davis epic

The world No 1, who had won the pair's only previous meeting at Indian Wells in 2013, has endured her travails in the opening week in Melbourne, she suffered an ankle injury in her first-round victory, but remains in with a chance of a maiden Grand Slam title.

Halep, 26, served for the match on three separate occasions in the decider but was pushed all the way by her unseeded American opponent in a 4-6 6-4 15-13 victory, which lasted three hours and 44 minutes.

Sharapova relishing Kerber test

It will be a meeting of the only two former champions in the women's draw, with Sharapova lifting the trophy a decade ago while Kerber was the winner in 2016.

The German endured a miserable 2017, slipping from world No 1 to outside the top 20, but she has been revitalised at the start of this season and is yet to lose a match.

Sharapova, still unseeded after returning from her 15-month doping ban, sees matches against the leading players as the best way to test her level.

Nadal, Wozniacki cruise through to Open second round with sweeping wins

Playing his first competitive match since pulling out of the ATP Tour Finals with knee trouble in November, the world number one showed no signs of early season rust as he tore through the evening match at Rod Laver Arena in one hour and 34 minutes.

Nadal pulled out of the Brisbane International earlier this month saying his training was slightly behind schedule due to the injury suffered midway through November's ATP Finals in London.

But any doubts over his fitness were allayed by his impressive court coverage while his trademark groundstrokes were on song.

Belinda Bencic dumps Venus Williams in Australian Open first round upset

The 20-year-old Swiss played the 37-year-old American great to perfection, soaking up the fifth seed's firepower and attacking her wavering serve with abandon.

In a tense grand slam opener that felt more like a final, Williams battled to keep touch in an enthralling second set, but Bencic unleashed two blazing forehand winners to close out the match in the 12th game.

The resurgent Bencic will meet the winner of Johanna Larsson and Luksika Kumkhum in the next round.

Federer: I should not be favourite

Federer returned from a lengthy injury hiatus 12 months ago to win a stunning 18th Grand Slam title in Melbourne, while this time his preparation has been virtually perfect.

His rival Rafael Nadal he has not contested a match since November because of knee troubles while the fitness of six-time champion Novak Djokovic is even more uncertain after six months out with an elbow injury, but Federer said of his expectations: "It's totally different.

Australian Open organisers under fire for Sharapova's red carpet treatment

Tournament director Craig Tiley has been forced to defend the Open's stance of choosing the 2008 Australian Open champion to conduct the draw less than two years since she tested positive to banned substance meldonium.

Sharapova served a 15-month doping ban for that positive test after she took the controversial medication during the 2016 Australian Open.

Serena will not defend Melbourne title

The 36-year-old had been planning to try and defend the title she claimed last year, for the seventh time in her superb career.