Here is a look at likely retentions for some teams.
Djokovic, seeking a record-extending ninth title in Melbourne, was cruising after winning the opening two sets of his third-round clash but a slip at 1-1 in the third set almost derailed his progress.
'I had some nerves but if you want to beat one of these guys you have to be unbelievably calm and keep your head there.'
On the men's side, the fields have already been divided into two ATP 250 tournaments.
The Swiss was handed a code violation for swearing in the third set of Tuesday's match after the lineswoman reported Federer to Serbian chair umpire Marijana Veljovic.
"(Novak) has said that he views this as a private matter for him. We would love to see Novak here, he knows that he'll have to be vaccinated to play here."
Medvedev will be glad to play the role of dream wrecker once again.
Djokovic practised his serves and returns with his entourage on an empty court at Melbourne Park
Grigor Dimitrov is the latest player to be hit by injury in Melbourne
Travis Head scored his second successive hundred while veteran Steve Smith wore the opposition down with a statement century to put Australia in control
Sinner fired both team members last month, before winning the US Open title to make it two Grand Slam trophies in 2024 following his breakthrough Australian Open triumph.
Play was held up during the Australian Open men's final on Sunday when a banner was unfurled protesting against the treatment of refugees, with one person jumping on centre court.
From a bowler's paradise on Day 1 to a batting haven on Day 2, the Perth pitch has defied expectations.
Top seed Aryna Sabalenka shook off a second-set blip to win three back-to-back Wuhan Open titles after beating Chinese fifth seed and home favourite Zheng Qinwen
We spotted some celebs from the world of Hollywood, cricket and comedy enjoying some tennis action and here we give a glimpse of them...
Poland will face Italy in their first ever Billie Jean King Cup semi-finals after beating the Czech Republic 2-1 in a hard-fought tie that ended in the early hours of Sunday.
U.S. Open champion Aryna Sabalenka will face world number four Coco Gauff in the semi-finals of the Wuhan Open after both players earned straight-set wins in the quarter-finals on Friday.
Former champions Stanislas Wawrinka and Rafael Nadal gave Australian Open organisers a massive boost on Tuesday when they both said they were looking forward to next week's season opening Grand Slam after battling long-term injuries.
Serena Williams reluctantly pulled out of this year's Australian Open on Friday, the American saying that while she was close to regaining full fitness after giving birth to her first child in September, she was not fully ready to defend her title.
Players competed at empty stadiums at Melbourne Park through the five-day lockdown but reduced capacity crowds of 7,477 have been permitted in each of Thursday's two sessions and the same number for the singles finals sessions on Saturday and Sunday.
A US Open full of upsets and hungry, young contenders offered the latest sign that men's tennis has entered a new era
World No 3 Rafael Nadal admitted that he may not play in the upcoming Australian Open after suffering a shocking first round defeat against Germany's Michael Berrer at the Qatar Open.
Naomi Osaka faces Zheng before possible meeting with Coco Gauff
Organisers are confident a rain-hit opening day will not hold up the tournament.
'She wants to come back in 2018 and defend her title and she's in training now'
Look who we spotted at the Melbourne Park this year.
A blue plexicushion centre court at Rod Laver Arena was the centrepiece of the Australian Open 2008 launch.
Tennis World No. 1 Novak Djokovic spent Orthodox Christmas in Australian immigration detention on Friday as his lawyers fought a government decision to remove him from the country that could scupper his shot at a record-breaking 21st Grand Slam.
Rediff.com presents the early surprises at the year's first Grand Slam.
Latvia's Jelena Ostapenko and Ukraine's Lyudmyla Kichenok won the women's doubles crown at the US Open with a 6-4, 6-3 victory over the Chinese-French pairing of Zhang Shaui and Kristina Mladenovic on Friday.
Former semi-finalist Marin Cilic has ruled himself out of this year's Australian Open, tournament director Craig Tiley confirmed on Saturday.
Despite former world No 1 Serena Williams not being in action for almost a year, British No 1 Johanna Konta still views Williams as the player to beat at the Australian Open in 2018.
Third seeds Barbora Krejcikova and Rajeev Ram defeated local favourites Astra Sharma and John-Patrick Smith 7-6(3), 6-1 to win the mixed doubles title at the Australian Open on Saturday.
Prize money row rumbling behind scenes at Melbourne Park
Ash Barty's bid to end the host nation's long wait for a homegrown Australian Open champion will begin against Ukraine's Lesia Tsurenko
Novak Djokovic is finally set to return to action next week after six months out with an elbow injury and will then decide whether to take part in the Jan 15-28 Australian Open.
Australia's last series win against India came in 2014-15, and they haven't tasted victory on Indian soil since 2004-05.
The 23-year-old said he expected Britain's Draper, who reached a Grand Slam semi-final for the first time, to be a strong contender.
Victoria is undergoing a second lockdown and has nearly 8,000 active COVID-19 cases, while NSW has about 800.
Jannik Sinner will hope to block out a rocking home crowd on Sunday when he faces Taylor Fritz in the US Open final at Flushing Meadows, where the 12th seed will be bidding to become the first American man in 21 years to win a Grand Slam singles title.