Nick Kyrgios pulled out of the Sydney Tennis Classic due to testing positive for coronavirus shortly before he was due to face Italy's Fabio Fognini.

The Australian had been one of the tournament's major draws as the home favourite but now cannot compete and that has subsequently thrown his Australian Open participation into question.

Fognini took full advantage of the situation as he saw off lucky loser Daniel Altmaier 6-3 7-5 to move into the second round.

There he will be joined by – among others – David Goffin, with the Belgian winning a game for the first time in eight months as he beat Facundo Bagnis 6-4 6-4 after an injury-ravaged 2021.

Fifth-seed Lorenzo Sonego was the highest seed in action and he was made to work hard for his 3-6 6-3 7-5 win over Hugo Gaston, needing almost two hours and 45 minutes to get the job done.

The day's other game saw Jordan Thompson win on home soil, beating Marcos Giron fairly comfortably 6-4 6-2.

At the Adelaide International 2, Tommy Paul came out on top in the battle of the Americans as he cruised to an impressive 6-2 6-3 win over Frances Tiafoe in just 69 minutes.

Local boy Aleksandar Vukic clinched the biggest scalp of his professional career as the world number 156 – a wild card entry for the tournament – beat Alexander Bublik 7-6 (7-5) 6-2.

Arthur Rinderknech and Jaume Munar also progressed, the latter defeating Australia's John Millman.

The Las Vegas Raiders sideline discussed settling for a tie before completing their dramatic playoff-clinching win over the Los Angeles Chargers.

Concluding an incredible Week 18 in the NFL, the Raiders sealed their first playoff berth since the 2016 season as Daniel Carlson's game-winning field goal settled a 35-32 classic as time expired in overtime.

The kick sent the Raiders and the Pittsburgh Steelers to the postseason and knocked out the Chargers, who had earlier recovered from 15 points down in the fourth quarter.

A stunning victory for the Jacksonville Jaguars over the Indianapolis Colts earlier on Sunday opened up the possibility of both the Raiders and Chargers settling for a tie in their winner-take-all season finale and sending both to the postseason at the expense of the Steelers.

The topic had been hotly discussed leading up to the game, with Chargers coach Brandon Staley emphatically ruling out such a scenario.

But that possibility suddenly looked likely as the game remained tied in the final minute of the extra period after both teams traded field goals.

There was a final twist, though, as Josh Jacobs' 10-yard run on third down, after a controversial decision by Staley to call a timeout and stop the clock with 38 seconds left, put Carlson in position to boot the Chargers out of the postseason with a 47-yard kick. 

The Raiders acknowledged they had pondered the prospect of settling for a tie as the game progressed and thought the Chargers were doing the same given they had not called timeout on a previous Jacobs run in overtime.

"We were going to take the field goal and try to win it," said Raiders interim coach Rich Bisaccia.

"But we were certainly talking about it [settling for a tie] on the sideline.

"We ran the ball there [near the end of OT], and they didn't call timeout, so I think they were probably thinking the same thing." 

Bisaccia hailed the Raiders' spirit after the team won their final four games against the Cleveland Browns, Denver Broncos, Colts and Chargers by a total of just 12 points.

He said: "We just found a way to have a chance to win at the end and we have been in this situation before.

"Derek Carr has been in two-minute situations before; he's been in four-minute situations before. Our defense has had to come up with stops at the end of the game.

"So you just can't say enough about how this team prepares. I just know they believe in each other when they go out there. They don't blink."

Asked whether the Raiders would have punted or taken a knee on fourth down if Jacobs had not got them into field goal range, Bisaccia said, "I don't know – it didn't happen!" before smiling and leaving his exchange with reporters.

Staley, meanwhile, was left to explain his thinking with the timeout after the Chargers fell agonisingly short.

"We needed to get in the right grouping, we felt like they were going to run the ball, so we wanted to get our best 11 personnel run defense in," said Staley.

"Make that substitution so that we could get a play where we would deepen the field goal."

"I had never been rooting for a tie more in my life,'' added Chargers quarterback Justin Herbert, who racked up 64 pass attempts, completing 34 for 383 yards, three touchdowns and one interception.

"That's the unfortunate part of being so close.''

The Raiders will face the Cincinnati Bengals on Wild Card weekend when the Steelers will take on the Kansas City Chiefs.

Carr, who threw for two touchdowns, will finally play in a playoff game for the first time after starting 127 games in the regular season.

"I'm excited, thinking about the next team we play, and then everything hurts," he said.

"It feels cool, it's awesome, but we've got to play a team that already beat us [the Bengals], so it's going to be tough.

"I just have this weird feeling in my heart like, 'The job's not done.' Like my favourite player, Kobe [Bryant], said, 'Job's not done'."

Nick Kyrgios is a doubt to take part at the Australian Open after testing positive for COVID-19.

The Australian star withdrew from the Sydney Tennis Classic hours before he was due to face Fabio Fognini.

The 26-year-old had already pulled out of the Melbourne Summer Set last week after struggling with an unknown illness that affected his asthma.

He was tested for coronavirus but all had come back negative until Monday.

With the first grand slam of 2022 just one week away, Kyrgios hopes he will recover in time to enter the draw.

"Hey everyone, I just want to be open and transparent with everyone, the reason I have had to pull out of Sydney is because I tested positive for Covid," he wrote on Instagram.

"I am feeling healthy at the moment with no symptoms. I wish everyone all the best and to stay safe where you can.

"If all goes well I will see you all at the Australian Open."

Kyrgios has not played a singles match since losing to Stefanos Tsitsipas at the Laver Cup last September and has dropped to 114 in the world rankings.

The former world number 13, who lost a thrilling five-set match with Dominic Thiem in the round of 32 in Melbourne last year, has only once gone as far as the quarter-finals at his home grand slam.

He reached the last eight in 2015, where he lost in straight sets to beaten finalist Andy Murray.

Rafael Nadal joked that he would rather Novak Djokovic does not play at the upcoming Australian Open after the world number one won his appeal to remain in the country.

Djokovic was left fighting for the right to compete at the opening grand slam of the year, a tournament he has won nine times, after authorities cancelled his visa last week.

A medical exemption was expected to allow the Serbian to enter the country, regardless of his vaccination status, which he has yet to formally disclose.

But the Australian Border Force declared Djokovic had been ordered to fly out of the country on Thursday, sparking a challenge to that decision by the tennis star's legal team.

After both sides had presented their cases, Djokovic was handed an Australian Open lifeline on Monday when defeating a deportation order brought by Australia's government

Judge Anthony Kelly ruled at Melbourne Circuit Court that Djokovic's visa cancellation order should be "quashed" immediately.

There may yet be another twist in the saga, though, as Australia's immigration minister Alex Hawke could still cancel the 34-year-old's visa on new grounds.

Djokovic now appears far more likely to defend his Australian Open crown than he did over the weekend, however, as he goes in search of a 21st major title.

While that will inevitably make Nadal's chances of success at Melbourne Park a whole lot tougher, the Spaniard said the decision to grant Djokovic's freedom must be respected.

"Whether or not I agree with Djokovic on some things, justice has spoken and has said that he has the right to participate in the Australian Open," he told Onda Cero.

"I think it is the fairest decision to do so, if it has been resolved that way. I wish him the best of luck.

"But on a personal level, I'd much rather he didn't play!"

Nadal described Djokovic's COVID-19 vaccination controversy "a circus" and reiterated that the vaccine "is the way to stop this pandemic and disaster".

The 35-year-old ramped up his preparations for the Australian Open by winning last week's Melbourne Summer Set without dropping a single set.

That was Nadal's first tournament in five months due to injury and means he has won at least one ATP Tour trophy in every season since 2004 onwards.

He is level with Djokovic and fellow great Roger Federer on 20 grand slam titles, with the trio locked in a race to finish with the most majors.

Kevin Durant hopes to use the Brooklyn Nets' upcoming road games with the Portland Trail Blazers and the Chicago Bulls as a chance to "build chemistry" with Kyrie Irving.

Irving was left off the Nets' initial roster for the 2021-22 season due to electing against receiving a COVID-19 vaccine.

Seven-time NBA All-Star Irving is not eligible to play in home games due to New York City's vaccine mandate, but he would have been available for most road games.

The Nets reversed course last month by including the 29-year-old as a part-time player and named him in their line-up for Wednesday's win over the Indiana Pacers.

Still unable to play in home games, Irving will have a chance to get minutes under his belt when the Nets head to Portland and Chicago on Monday and Wednesday respectively.

And Durant, who scored 28 points in Sunday's 121-119 win against the San Antonio Spurs, is glad to have the chance to reignite his partnership with Irving.

"We're definitely a better team, a way better team with Irving," Durant said. "He's definitely going to give us a lift. 

"I'm looking forward to it – a couple games on the road, an opportunity for us to build our chemistry. I'm looking forward to it."

Nets coach Steve Nash has previously said he is reluctant to overuse Irving on his return to the side, but the point guard is set to feature against Portland.

"We'll see," Nash said when asked about Irving's availability. "Typically, with a game under his belt he could play a little more [Monday], so that's definitely possible."

Irving played 32 minutes against the Pacers and scored 22 points – he averaged 26.9 from across 54 games in 2020-21.

The Nets' overtime win against San Antonio, having blown the lead late in regulation, was their first at Barclays Center in six games since December 16 and moved them to 25-13 for the season.

The Eastern Conference's second-placed side are playing catch-up owing to a run of rescheduled games, meaning a long flight from Portland to Chicago and back to New York again before Thursday.

Asked about the uniqueness of the situation, Nash said: "I can't remember all the back-to-backs I ever played in but I don't remember any six-hour flights in between.

"So it's different, but we've got to take it as an opportunity, an opportunity to succeed under adversity and this moment where we're trying to find ourselves again.

"We have a tough back-to-back, so let's embrace it. Let's see if we can win both, and if we can win both, or at least play well in both, maybe that gives us a spark."

LeBron James could not help but admire Ja Morant's astonishing block for the Memphis Grizzlies in their 127-119 defeat of the Los Angeles Lakers on Sunday.

James top-scored with 35 points and added seven assists for the Lakers, taking him above Oscar Robertson (9,887) for the seventh most in NBA history.

But his efforts was ultimately relegated to a mere footnote afterwards, with Morant attracting headlines and acclaim for his Michael Jordan-esque block on Avery Bradley in the first quarter.

Morant had been robbed by Bradley at the other end but the 22-year-old All-Star contender darted back and came out from behind his rival to smash the ball off the glass with both hands following a lay-up attempt.

He was not going to be modest about it, saying after the game: "I just got back and made an incredible play.

"I was just trying to gather the ball. Most of the time on a break like that, if you block it, they might have a player trailing to get the ball and lay it up.

"It worked out perfect for me. Now I'm probably all over the internet for it."

Indeed he was, and among those applauding his efforts was James, clearly impressed even if the incident was to the Lakers' detriment.

"It starts with timing and also just stalking your prey," James said. "And that's exactly what Ja was doing that whole play, and I saw it happen.

"I didn't know he was going to do it in that fashion, but they got rockets in his calf muscles. It was just a spectacular play."

Russell Westbrook was less willing to dish out praise, though, producing a typically curt response.

"It was a block," he said.

But Jaren Jackson Jr. was not having that, lauding it as arguably the greatest such intervention he had seen in basketball.

"That's probably the best block I've ever seen live, probably the best block I've ever seen, period," he said.

"That was crazy. I knew he was going to do it, too, because he always loads up right before."

Victory saw the Grizzlies improve to 28-14, giving them the fourth-best record in the Western Conference.

It also ensured they set a new franchise record of nine successive wins, having previously racked up eight in a row on four separate occasions.

Novak Djokovic has sensationally been handed an Australian Open lifeline by a Melbourne court.

The men's tennis world number one secured his freedom, defeating a deportation order brought by Australia's government.

The Serbian secured an injunction against immediate deportation on Thursday and spent the weekend at a detention hotel.

Ahead of the Australian Open, where he has won the men's singles title a record nine times, including last year, Djokovic arrived in the country with what he insisted were the correct documents.

Yet Australian Border Force officials cancelled his visa application, stating Djokovic had "failed to provide appropriate evidence to meet the entry requirements to Australia".

Lawyers for the 34-year-old stated he was granted a temporary activity visa on November 18.

The legal team said he was granted a medical exemption for the first grand slam of the year after a COVID-19 positive test on December 16, and was later given the go-ahead by Australia's Department of Home Affairs to travel.

However, lawyers for the government issued their own court filing on Sunday, disputing Djokovic's right to come to Australia.

"There is no suggestion that the applicant had 'acute major medical illness' in December 2021," said the government filing. "All he has said is that he tested positive for COVID-19. This is not the same."

The issue has become a political hot topic in Australia, with Djokovic's stance on COVID-19 matters rankling with many, particularly in the state of Victoria, who have faced hard lockdowns during the pandemic.

The case was listed as Novak Djokovic v Minister for Home Affairs. That is Karen Andrews; however, the matter has been one in which prime minister Scott Morrison has also become a central figure, insisting when Djokovic's visa was revoked: "Rules are rules, especially when it comes to our borders. No one is above these rules."

Djokovic has declined to confirm his vaccination status, but by requiring an exemption to compete at Melbourne Park it has been widely assumed he has not been jabbed. The government filing on Sunday stated it was "common ground that the applicant is unvaccinated".

His case was heard at Melbourne's Federal Circuit Court on Monday, with Judge Anthony Kelly ruling that the Serbian's visa cancellation order is "quashed" immediately.

This means Djokovic's visa is now valid and he can enter Australia ahead of the Australian Open getting underway in a week's time.

Tournament director Craig Tiley had said ahead of the hearing that he hoped Djokovic would be cleared to play and defend his title.

The drawn-out saga may not be entirely over just yet, however, as government lawyer Chris Tran indicated Australia's immigration minister – who has exceptional powers – may consider cancelling Djokovic's visa again.

Novak Djokovic has sensationally been handed an Australian Open lifeline by a Melbourne court.

Klay Thompson marked his return from a two and a half year absence with 17 points as the Golden State Warriors saw off the Cleveland Cavaliers 96-82 on Sunday.

The 31-year-old, who had missed 941 days rehabbing from a torn ACL and ruptured Achilles tendon, was 7 of 18 from the field and 3 of 8 from three-point range.

Thompson also added three rebounds, an assist and a steal in 20 minutes, earning a rousing reception as he left the court

"I was just happy to be out there doing what I love again and getting my rhythm back," Thompson said. "It feels really good... It was surreal. 

"The ovation to start the game, I just was so grateful for these fans. It was special. I'm never going to forget this night."

With his impressive comeback display, Thompson reached 12,000 career points and 1,800 made three-pointers.

Red-hot Grizzlies set franchise record 

The Memphis Grizzlies soared to new heights by beating the Los Angeles Lakers 127-119 as they won nine successive games for the first time in franchise history. 

The Lakers had won four in a row ahead of the contest but could not live with their opponents, who had previously won eight in a row in 2004, 2012, 2013 and 2015.

Desmond Bane had 23 points and Jaren Jackson Jr. added 21, though it was a breathtaking block from Ja Morant to deny Avery Bradley that stole the show.

While it was a disappointing occasion for the Lakers, LeBron James scored 35 points – 23 of those arriving in the first half – and added seven assists.

That saw James move to 9,888 career assists in NBA and pass Oscar Robertson (9,887) for the seventh-most in history.

Mavericks halt Bulls' winning run

The Chicago Bulls' own nine-game winning run came to an end with a 113-99 defeat to the Dallas Mavericks, with Luka Doncic starring for the home side.

Doncic had 22 points, 14 rebounds and 14 assists for his third triple-double of the campaign, while Josh Green and Maxi Kleber had season highs of 18 points each.

Elsewhere on Sunday, Kevin Durant scored 28 points for Brooklyn Nets in their 121-119 win against the San Antonio Spurs.

Cam Thomas made a runner in the lane with a little over a second to go in overtime as the Nets, who led by 10 with four minutes to play, snapped a five game losing run at home.

The Las Vegas Raiders sealed their first playoff berth since the 2016 season as Daniel Carlson's game-winning field goal settled a 35-32 classic and sent them and the Pittsburgh Steelers to the postseason and knocked out the Los Angeles Chargers.

A stunning victory for the Jacksonville Jaguars over the Indianapolis Colts earlier on Sunday opened up the possibility of both the Raiders and Chargers settling for a tie in their winner-take-all season finale and sending both to the postseason at the expense of the Steelers.

Chargers coach Brandon Staley emphatically ruled out such a scenario earlier in the week and it appeared as if a stalemate would not be a possibility when the Raiders led by 15 in the fourth quarter.

But Chargers Pro Bowl quarterback Justin Herbert led them back to set up overtime and the game remained tied in the final minute of the extra period after both teams traded field goals.

There was a final twist, though, as Josh Jacobs' 10-yard run on third down, after an inexplicable decision by Staley to call a timeout and stop the clock, put Carlson in position to boot the Chargers out of the postseason, which he did with a 47-yard kick. 

The Raiders will face the Cincinnati Bengals on Wild Card weekend when the Steelers will take on the Kansas City Chiefs.

Las Vegas surged into a 10-0 first-quarter lead but a pair of touchdowns from Austin Ekeler flipped things in the Chargers' favour.

A scoring drive that saw the Chargers allow the Raiders to convert on third down and 23 and Las Vegas benefit from a contentious pass interference penalty enabled the hosts to respond through Josh Jacobs' touchdown plunge before half-time.

Staley paid the price for a dubious decision to go for it on fourth down from Los Angeles' own 18-yard line as the Raiders tacked on a third-quarter field goal.

The Chargers' hopes were circling the drain after Hunter Renfrow caught his second touchdown pass and Herbert was intercepted by former Charger Casey Hayward, the Raiders then adding another field goal to make it 29-14.

But Herbert connected on a 23-yard dart to Josh Palmer and succeeded with the subsequent two-point conversion, before leading the Chargers on a Herculean 19-play drive that ended with him hitting Mike Williams for a 12-yard score as time expired to force overtime.

Carlson restored the Raiders' advantage with his leg, only for the Chargers to respond in kind after a drive on which they became the first team in 30 years to convert sixth fourth downs in the same game.

Yet Herbert's remarkable efforts were undone as poor run defense and worse clock management teed up Carlson to end the Chargers' season.

Jimmy Garoppolo and the San Francisco 49ers revelled in a win they won't forget for a long time after claiming a dramatic 27-24 overtime triumph over the Los Angeles Rams to punch their ticket to the postseason.

The Niners went into Sunday's clash at SoFi Stadium knowing a victory would clinch a place in the playoffs for the second time in three seasons. A loss would have allowed the New Orleans Saints, who cruised past the Atlanta Falcons, to sneak in at their expense.

Quarterback Garoppolo, playing with a torn ligament in his left thumb, struggled early and the Niners fell into a 17-0 hole, a Robbie Gould field goal all San Francisco could muster before half-time.

But Deebo Samuel ran for a touchdown and then threw one to Jauan Jennings on a trick play to tie things up, with the same receiver on the end of a pass from Garoppolo to force overtime after Jalen Ramsey's endzone interception followed by Matthew Stafford's touchdown strike to Cooper Kupp had put the Rams back on top 24-17.

The 49ers won the coin toss and Garoppolo led a 12-play drive that ended in a Robbie Gould field goal to give them their first lead of the game, one they clung on to as rookie Ambry Thomas intercepted a Stafford deep shot intended for Odell Beckham Jr. to give San Francisco a sixth successive win over the Rams, securing a Wild Card matchup with the Dallas Cowboys.

Garoppolo was limited in practice throughout the week after missing the 23-7 win over the Houston Texans in Week 17, but felt his hand improved over the course of an instant classic.

Asked about his thumb, Garoppolo told a media conference: "It feels great right now, after a win of course. It got better as it went I would say.

"Obviously with injuries like that your body's just learning and adapting the whole time. Early on it was pretty numb so it felt alright and then just got better and better as it went and I think my arm just kind of learned how to adapt to it.

"[There were] a lot of emotions, throughout the whole game, getting off to a slow start and just coming back like we did.

"It took everything, we say that a lot of weeks but this one really did. I felt it after the game I know a lot of guys in that locker room did, it was one of those games that you won't forget anytime soon."

Shanahan, who said Garoppolo's strong week of practice made it an easy decision to start him over rookie Trey Lance, echoed his quarterback's sentiments.

"Our guys are real resilient, I've been very proud of them," Shanahan said. 

"I'm just glad we get to go into the tournament and be a part of it because regardless of what happened today I was going to be very proud of those guys.

"Our goal every year is to get into the tournament so you've got a chance at the ultimate one. I think it's real hard when you have a season where you lose four in a row [as the Niners did Weeks 3-7].

"Most places when you lose four in a row it's tough to keep guys together. The character in our building and the players and everyone around it makes easy, you can just focus on your job and keep fighting and that's what our guys have done all year, they've just kept fighting, not worried about it anything else, in the meantime I think we've gotten better each time doing that and we've been able to overcome some injuries too."

Cameron Smith set a record 72-hole score on the PGA Tour as he claimed a stunning triumph at the Tournament of Champions.

Smith entered the final round in a share of the lead with Jon Rahm, who tied the course record with his 12-under-par 61 on Saturday.

Rahm was again in stellar form at Kapalua, going seven under for his fourth round, but came up just short as Smith made the most of favourable scoring conditions in Maui.

The Australian carded a blemish-free eight-under 65, which he capped with a three-foot putt for a clinching birdie.

That saw him improve to a 34-under 258 for the tournament. No man has ever finished as many shots under par on the PGA Tour, with Smith beating Ernie Els' tournament record score of 31 under set way back in 2003.

Rahm also bettered that score, as did Smith's compatriot Matt Jones, who finished 32 under par to claim third place.

But the day and the week in Hawaii belonged to Smith, who has now won the tour for three successive seasons.

"Mate, it was intense. Jonny and I played well the whole day and we had Matty in the group in front lighting it up as well," Smith said.

"Unreal round, something I'll never forget for sure.

"I was just trying to hit one shot at a time, I know that sounds cliche. We spoke about it earlier in the day that we wanted to get to 35 under. We missed it by one so in that sense disappointing but happy to come away with the W."

Rahm, making his season debut, understandably took heart from a performance that would under most circumstances have earned him victory.

"I have every reason to be smiling," Rahm said. "It's a bittersweet moment."

The San Francisco 49ers punched their ticket to the postseason as Ambry Thomas' overtime interception clinched a dramatic comeback win over the Los Angeles Rams.

San Francisco went into the Week 18 clash knowing a win would see them reach the playoffs for the second time in three seasons. A loss would allow the New Orleans Saints, who cruised past the Atlanta Falcons, to sneak in and claim the final Wild Card berth.

The latter outcome looked the more likely when the Rams surged to a 17-0 lead and, even though the Niners got a field goal before half-time, San Francisco still faced an uphill battle.

However, Deebo Samuel scored a touchdown on the ground and then threw another to Jauan Jennings on a trick play to tie things up.

A juggling interception of Jimmy Garoppolo by Jalen Ramsey in the endzone followed by a Matthew Stafford strike to Cooper Kupp put the Rams in a seemingly commanding position at 24-17.

However, Garoppolo - playing with a torn ligament in his right thumb - led a five-play, 88-yard drive that finished with him connecting with Jennings, forced overtime at SoFi Stadium.

The 49ers won the coin toss and a 12-play, 69-yard drive on which Jennings featured heavily set up a Robbie Gould field goal to give San Francisco the lead for the first time.

And it was an advantage they held as Stafford's deep shot for Odell Beckham Jr. was plucked out of the air by rookie cornerback Thomas to set up a mouth-watering Wild Card matchup with the Niners' historic rivals the Dallas Cowboys.

For Los Angeles, it is a sixth successive defeat to the 49ers, though they still won the NFC West after the Seattle Seahawks beat the Arizona Cardinals, whom the Rams will host in the opening round of the playoffs.