Emma Raducanu has appointed Torben Beltz as her new coach almost seven weeks after parting company with Andrew Richardson.

The 18-year-old rose to international fame in September when she pulled off the incredible feat of clinching the US Open before ever even winning a single match on the WTA Tour.

Raducanu beat fellow teenager Leylah Fernandez to become the first qualifier in tennis history to win a grand slam and youngest winner of a women's major since 17-year-old Maria Sharapova took the Wimbledon title in 2004.

But she announced soon after that she and Richardson were no longer working together, with Raducanu continuing in the meantime without a coach as she scoured for someone with more WTA Tour experience.

Since the US Open, she has played just five matches and lost three of them, the latest coming on Tuesday as she suffered a 6-1 6-7 (0-7) 7-5 defeat to Wang Xinyu at the Linz Open, where Raducanu was the top seed.

But as she looks ahead to starting pre-season at the end of November, Raducanu will begin working with Beltz in the hope of building on her incredible breakthrough year.

The German was Angelique Kerber's coach during her US Open and Australian Open successes in 2016, and Raducanu is excited to get started.

Speaking after her defeat in Linz, Raducanu said: "You guys cracked it! It's obviously a great privilege to be working with such an experienced coach.

"I'm definitely very excited to work with him throughout the pre-season and into next year. I'm feeling excited about all the work that is to come.

"I think he brings a lot of experience. Obviously he's worked with Kerber, who's such a great player and has done extremely well, won three slams. I think that experience definitely helps with someone as inexperienced as me.

"He can help guide me through, which I feel really confident about, and also he's a really positive, cheerful guy who brings great energy to the team, so I think that's also important when you're travelling on the road for quite a long time on the tour."

Sebastian Korda produced an inspired turnaround from two sets down to defeat Hugo Gaston 3-4(2) 3-4(6) 4-0 4-3(3) 4-0 in his opening match at the Next Gen ATP Finals.

The American became only the second player in the history of this event to achieve the feat, after Borna Coric against Karen Khachanov in 2017.

Korda is the second seed in Milan this year following an impressive 2021 that saw him capture his first ATP title at the Emilia-Romagna Open, and reach the Miami Masters quarter-finals and Wimbledon fourth round.

The 21-year-old looked destined to begin Group B with a defeat after losing the opening two sets on tie-breaks, while he also saved match point at 3-2 down in the fourth.

Korda subsequently dominated the final set to complete a remarkable victory in just over two hours.

The world number 39 said: "[I] just stayed calm and kept thinking what I could do better. 

"I did play very well tactically in the first two sets, but I figured a couple of things out during the tie-break and I think that helped me for the rest of the match."

Meanwhile, top seed Carlos Alcaraz enjoyed a straight-sets victory over Holger Rune, prevailing 4-3(6) 4-2 4-0.

The Spanish teenager has also enjoyed a fruitful year on the ATP circuit, triumphing in Umag while beating world number three Stefanos Tsitsipas on the way to reaching the US Open quarter-finals.

And he made the perfect start in Group A; enjoying an 88 per cent first-serve success rate in a commanding win.

"I think it was a great match, both of us played really well," the world number 32 said.

"I am trying to go to the net and play aggressively in the important moments and stay calm. I am trying to do this every match."

Elsewhere, Brandon Nakashima – champion in Brest last month – made it 10 wins from 11 matches as he beat Juan Manuel Cerundolo 4-1 3-4(3) 4-1 4-0.

The 20-year-old, who became the youngest American to reach multiple tour-level finals since Andy Roddick earlier this year, was pegged back in the second set, but dominated the final two to seal victory in just over an hour-and-a-half.

However, there was no joy for home favourite Lorenzo Musetti, who was beaten in four sets by Sebastian Baez.

Though roared on by his home crowd, the world number 58 was unable to deliver in his opening match. Baez – a five-time Challenger Tour winner in 2021 – took full advantage to prevail 4-1 4-1 3-4(5) 4-3(5).

Montreal Canadiens goaltender Carey Price revealed he has received treatment for substance abuse.

The 34-year-old said he entered a residential facility last month after having reached "a very dark place" following years of "neglecting" his mental health.

Price had only just returned to the Canadiens following surgery on a knee injury during the off-season.

"Over the last few years I have let myself get to a very dark place and I didn't have the tools to cope with that struggle," he said via an Instagram post.

"Last month I made the decision to enter a residential treatment facility for substance use. Things had reached a point that I realized I needed to prioritize my health for both myself and for my family. Asking for help when you need it is what we encourage our kids to do, and it was what I needed to do.

"I am working through years of neglecting my own mental health which will take some time to repair; all I can do is take it day by day. With that comes some uncertainty with when I will return to play.

"I appreciate all of the overwhelming support and well wishes. I please ask that the media and our hockey community continue to respect our privacy at this time. Your support and respect of this so far has been a critical piece to my recovery."

Price, a seven-time NHL All-Star and Olympic gold medallist in 2014 with Canada, helped the Canadiens to their first Stanley Cup Finals appearance in 28 years last season, where they lost 4-1 to the Tampa Bay Lightning.

He posted a .901 save percentage last season, a figure he improved to .924 during the Canadiens' playoff run.

Speaking on Monday, coach Dominique Ducharme said: "I haven't met him yet. I need to see him. I'll see him tomorrow.

"He wants to come back and play, but there's other things to manage. We talked about the injury that he was coming back from, getting back in shape, and playing shape too. There's many steps to be taken, but he wants to play. He wants to be part of our group. He wants to help out."

Daniil Medvedev has confirmed he will play at the Australian Open next year, as the debate over vaccine mandates continues.

Medvedev was defeated by Novak Djokovic in the final of this year's tournament, though the Russian has gone on to enjoy a brilliant season.

He has won four titles, including his first grand slam, beating Djokovic at the US Open in September to end the latter's pursuit of a clean sweep of the four majors in 2021.

Djokovic and Medvedev met again on Sunday, with the world number one coming out on top to clinch his sixth Paris Masters title and a record 37th triumph at ATP 1000 events.

Medvedev had appeared non-committal about being vaccinated against COVID-19, which is likely to be a requirement for any player wishing to compete at the Australian Open, but he dispelled doubts around his involvement when he tweeted on Tuesday: "See you in January @AustralianOpen."

While Medvedev will be involved in Melbourne, the participation of Djokovic – who is a nine-time Australian Open champion – is not yet known.

The Serbian has previously appeared hesitant over the coronavirus vaccine mandate, though he has not revealed whether he has been vaccinated or not.

Australia has enforced strict measures throughout the pandemic, with Melbourne having been under lockdown on six occasions since March 2020. Indeed, the city only lifted its most recent restrictions towards the end of October.

Athletes arriving in Australia prior to last year's event had to go through a mandatory two-week hotel quarantine.

Despite Australia's vaccination programme gaining momentum, travellers who are not citizens must be able to provide proof of vaccination and a negative PCR test result, while quarantine regulations vary depending on state rules.

Tennis Australia is reportedly still hopeful of securing a deal for unvaccinated players to compete in the tournament, subject to a two-week quarantine, with prime minister Scott Morrison suggesting players could be granted an exemption. 

On Tuesday, though, Victorian premier Daniel Andrews insisted players will have to be vaccinated.

"I'm not going to have people sitting in the grandstands having done the right thing, only to have millionaire players that ought [to] be vaccinated running around the place being essentially at such higher risk of spreading this – getting it and giving it," he said.

Speaking last month, Djokovic said: "I don't know if I'm going to Australia, I don't know what's going on. Currently, the situation is not good at all.

"Of course, I want to go, Australia is my most successful grand slam, I want to participate, I love this sport, I still have motivation."

The European Tour will become the DP World Tour from the start of the 2022 season in what has been described as a "ground-breaking evolution."

Prize money will increase to over $200million for the first time, with a new minimum prize fund of $2m for all tournaments solely sanctioned by the DP World Tour.

There will be 47 tournaments in 27 different countries, including new events in the United Arab Emirates, Japan, South Africa and Belgium, along with an expanded Rolex Series comprising of five events.

The Abu Dhabi Championship, the Dubai Desert Classic, the Scottish Open, the BMW PGA Championship and the season-ending DP World Tour Championship will be the Rolex Series events.

The Barbasol Championship and the Barracuda Championship in the United States and the Scottish Open will be co-sanctioned with the PGA Tour.

The Joburg Open will be the opening event of the DP World Tour from November 22-25.

Keith Pelley, chief executive of the European Tour group, said: "Today’s announcement is undoubtedly a momentous one in the proud history of our Tour. The launch of the DP World Tour in 2022, coinciding with both of our 50th anniversaries, will herald a new era in global golf, and crucially it will benefit everybody involved – all our players, caddies, fans and partners – as well as making an important contribution to wider society.

"The entire ecosystem of our Tour will be strengthened because of this hugely significant deal, and that was essential to us and to DP World, who have been an incredible supporter of our Tour as well as golf more widely, from grassroots through to the elite professional game.

"The DP World Tour is, therefore, a natural evolution of our decade-long partnership, and the presence of ‘World’ in our new title better reflects our global reach."

Jay Monahan, commissioner of the PGA TOUR and board member of the European Tour, added: "Thanks to the support of long-standing partner DP World, today's announcement significantly elevates the European Tour on a global basis.

"We are excited for the continued growth and evolution of the European Tour, as well as the momentum this provides toward our Strategic Alliance. I've said before that our respective Tours are positioned to grow – together – over the next 10 years faster than we ever have at any point in our existence, and today's announcement is another point of proof in those efforts."

England will be without Joe Marler when they face Australia at Twickenham on Saturday after the prop tested positive for coronavirus.

Marler returned a positive lateral flow test on Monday and immediately went into isolation.

The 31-year-old will isolate for 10 days after a PCR test confirmed he has contracted COVID-19.

All of the other England players and staff returned negative lateral flow tests, with additional PCR test results not yet received.

Owen Farrell rejoined the squad on Monday after he missed the 69-3 hammering of Tonga on Saturday, having tested positive for coronavirus last week.

Marler came off the bench in that thrashing at Twickenham, but will play no part against the Wallabies.

He will hope to be available to return when Eddie Jones' side take on world champions South Africa on November 20.

The sight of Stephen Curry dazzling in the NBA will never get old for Golden State Warriors head coach Steve Kerr.

Curry was in sensational form once again as the Warriors moved to a league-best 9-1 for the season with a 127-113 triumph over the Atlanta Hawks.

He had a season-high 50 points, to go alongside 10 assists. In 35 minutes, he was 14-for-28 from the field, nine-for-19 at the three-point range and drained each of his 13 free throws.

The accolades just keep on coming for an all-time NBA great. This performance marked the 10th 50-point game of his career, while he joined Wilt Chamberlain and Rick Barry as the only Warriors players in franchise history to put up a line of 50 points and 10 assists.

At 33, Curry is now also the oldest player to record a 50-10 game, surpassing the legendary Chamberlain, while only Michael Jordan (5) has more than his four 50-point games at the age of 32 or older.

"That was just a stunning performance by Steph," Kerr said of Curry. 

"He was amazing. I want to say I've never seen anything like it but I've been watching it for seven years, so I have seen something like it and still it's just incredible to watch.

"It doesn't get old, for sure."

Curry's final act of the evening was typically brilliant as he drained a 16-footer with just under four minutes of time remaining, leaving the court to a standing ovation at the Chase Center.

"It's always nice. You never come out with like a certain number in mind," Curry said.

"It's just when you get it going, you just keep going."

Nikola Jokic said "I need to protect myself" but admits he regrets the "stupid play" that saw him ejected for a violent shove on Markieff Morris in the Denver Nuggets' 113-96 win over the Miami Heat.

League MVP Jokic reacted angrily when Morris came in with a hard foul midcourt, catching his opponent with a left elbow to the chest.

Jokic furiously chased Morris down and responded with a right forearm shove to the back, sending the Heat star crashing heavily to the court.

A suspension and fine could now be on the cards for Jokic, who later rued his moment of madness.

"It's a stupid play. I feel bad. I am not supposed to react that way," he told reporters. 

"I thought it was going to be a take foul. I think it was a dirty play. And I just needed to protect myself. I felt bad. I am not supposed to react that way, but I need to protect myself."

He added: "I don't know who showed me the clip, and actually his head snapped back [after the shove], so I feel really bad. It's a bad move."

It poses a potential dilemma for Nuggets head coach Michael Malone, who was without the already injured Jamal Murray on Monday, while Michael Porter Jr. was absent with a lower back issue.

If Jokic is suspended as well, the Nuggets could be without their three best players when they face the Indiana Pacers on Wednesday.

"I will concern myself when they tell us he's suspended," Malone said. 

"I am not going to waste any of my time looking into my crystal ball and my tea leaves. I don't have any of that. 

"He's available until they tell me he's not. And I don't see any reason why he wouldn't be available Wednesday night."

Jokic's indiscretion came with just two minutes and 39 seconds remaining in a game where he had produced a triple-double of 25 points, 15 rebounds and 10 assists.

Heat coach Erik Spoelstra labelled Jokic's retaliation as "uncalled for".

"That was a very dangerous and dirty play," he said. 

"Keef took a foul, and it was one of those fastbreak-take fouls, and he did with his shoulder. You might deem that maybe as a little bit more than just slapping somebody, but after watching it on film, it was a take foul. 

"That's how I saw it. And the play after, that's just absolutely uncalled for."

The Nuggets moved to 6-4 with the win to sit sixth in the Western Conference, while the 7-3 Heat are second in the east.

Stephen Curry posted 50 points and 10 assists to guide the NBA-leading Golden State Warriors to a 127-113 win over the Atlanta Hawks.

Curry enjoyed a season-high night in terms of points as the Warriors won for the ninth time in their opening 10 games of the 2021-22 campaign on Monday.

The two-time MVP became the only NBA player in the last 25 years to have 50-plus points, 10-plus assists and a plus-minus of 30 or better in a single game, according to Stats Perform.

Curry, who had seven rebounds and nine three-pointers, also joined James Harden as the only players to put up 50-plus points, 10-plus assists in 35 minutes or fewer in the last 40 seasons.

The three-time champion became the third Warriors player in franchise history with at least 10 50-point games.

Bulls stop star-studded Nets

Kevin Durant recorded 38 points and 10 rebounds but the Brooklyn Nets still lost 118-95 at the Chicago Bulls. All of Chicago's starters – DeMar DeRozan (28), Zach Lavine (24), Nikola Vucevic (11 and 13 rebounds), Lonzo Ball (11) and Javonte Green (11) – finished with double-digit points to snap Brooklyn's five-game winning streak.

In the absence of Joel Embiid (health and safety protocol), Andre Drummond had 14 points and 25 rebounds for the Philadelphia 76ers. He became the first 76er with 25-plus rebounds in a game since Charles Barkley in 1987. Shorthanded Eastern Conference leaders the 76ers lost 103-96 to the New York Knicks, however.

Russell Westbrook (17 points, 14 assists and 12 rebounds), Anthony Davis (32 points and 12 rebounds) and Carmelo Anthony (29 points on seven-of-10 three-pointers) helped the Los Angeles Lakers outlasted the Charlotte Hornets 126-123 in overtime. LaMelo Ball had a triple-double of 25 points, 15 rebounds and 12 assists for the Hornets.

Jokic loses his head

The Denver Nuggets upstaged the high-flying Miami Heat 113-96, despite having reigning MVP Nikola Jokic ejected. Jokic registered a triple-double of 25 points, 15 rebounds and 10 assists before he was tossed for violently slamming his shoulder into Markieff Morris late in the final period.

Denver Nuggets star Michael Porter Jr. will be sidelined for the "foreseeable future" due to a back injury.

Porter left Saturday's 95-94 win over the lowly Houston Rockets in the opening quarter because of back tightness and sat out Monday's NBA game against the high-flying Miami Heat.

Prior to Denver's matchup with Miami, Nuggets head coach Michael Malone said Porter will continue to undergo testing on his back.

"There's no doubt, regardless of his mood, we all have to support Michael, just like we support Jamal [Murray]," Malone said.

"And again, Michael could be back in a week, it could be more than that. So when I say, 'foreseeable future,' I'm not really sure what that means, I just know that he's not playing tonight."

"This is a process where we're being very cautious, talking to doctors, getting imaging all that kind of stuff," Malone added.

Porter, who signed a max contract before the start of the season, has been averaging 9.9 points, 6.6 rebounds and 1.9 assists per game in 2021-22.

Giannis Antetokounmpo was awestruck as the Milwaukee Bucks became the first NBA champions to visit the White House in five years.

An annual tradition of the NBA champions making their way to the official residence of the United States president in Washington was put on hold during Donald Trump's term – the Cleveland Cavaliers were the last titleholder to visit the White House when Barack Obama hosted in 2016.

That hiatus ended on Monday when superstar Antetokounmpo and the Bucks – who claimed their first championship since 1971 last season – took centre stage alongside president Joe Biden.

"This is awesome," Antetokounmpo said. ... "A kid from Sepolia, Athens, Greece — grew up from two Nigerian parents who were struggling every day to provide for us. ... It's an unbelievable opportunity to be able to be in the White House meeting the president of the United States.

"I could not be as honoured and happy that something like this — that I've accomplished something like this in my life."

Antetokounmpo added: "For everybody out there, this is a great example that with hard work, with sacrifices — if you dedicate yourself to waking up every single day and try to get better in anything you do, in anything you love and believe in your dreams — you can accomplish great things in life. 

"Man, as I said. I've done that my whole life. And I'm in the White House." 

Biden hailed the Bucks for their efforts to promote coronavirus vaccinations and for speaking out following the 2020 police shooting of Jacob Blake.

The NBA postponed games in 2020 after the Bucks announced they would not participate in Game 5 of a first-round playoff series, Milwaukee seeking to shed light on racial injustices.

"You took a stand for justice and peace in the wake of the Jacob Blake shooting in Kenosha, Wisconsin, and you've gotten people engaged," Biden said.

Collin Sexton is set for an extended period on the sidelines after sustaining a torn meniscus in his left knee, dealing a blow to the Cleveland Cavaliers. 

The Cavaliers have made an impressive 7-4 start to the season, with Sexton playing a pivotal role by leading the team in scoring at an average of 16 points per game. 

However, he went off hurt in the 126-109 win against the New York Knicks on Sunday – Cleveland's fourth straight victory.

No timetable has been supplied for Sexton's return as further examination of his injury is still required, according to the team. 

A Cavs statement read: "Cavaliers guard Collin Sexton left Sunday night's road game at New York in the second quarter with a left knee injury and did not return to action. 

"Further examination of the injury and an MRI administered today at Cleveland Clinic Sports Health revealed a meniscus tear. 

"Sexton will undergo additional evaluation after which time his status will be updated." 

Sexton is in his fourth season in the league and has only missed 12 games during his NBA career.

Cavs team-mate Kevin Love tweeted: "Damn @CollinSexton02 heal fast you brother know you'll put in the work."

Philadelphia 76ers center Joel Embiid has entered the NBA's health and safety after reportedly testing positive for COVID-19. 

Embiid was expected to sit out Monday's meeting with the New York Knicks as planned rest on the first leg of a back-to-back, but the 76ers subsequently announced he had entered the protocols. 

According to ESPN, the four-time All-Star will now sit out for at least 10 days, ruling him out of Philadelphia's next five games. He could return against the Denver Nuggets next week with the 76ers on a six-game road trip. 

Embiid is averaging 21.4 points, 9.4 rebounds and a career-high 4.0 assists for the 8-2 76ers, who top the Eastern Conference despite having been shorthanded for much of the season.

The 76ers already had Tobias Harris, Matisse Thybulle and Isaiah Joe in the health and safety protocols. 

They have won all four of their games without Harris, including a 113-103 success over the Portland Trail Blazers that Embiid was rested for. 

Danny Green sustained a hamstring injury in that game and was questionable to make his return against the Knicks. 

Philadelphia also remain without Ben Simmons, who has yet to feature this season as he seeks a trade.