England head coach Eddie Jones is self-isolating after assistant Matt Proudfoot tested positive for coronavirus.

England Rugby announced on Wednesday that Proudfoot, who is asymptomatic, returned a positive in the latest round of pre-tournament testing ahead of the Six Nations and is now in isolation.

Jones and attack coach Simon Amor were identified as close contacts and must also self-isolate for 10 days, as per United Kingdom government guidelines.

Should they return further negative tests, Jones and Amor will be able to link up with the squad at St George's Park from January 28.

England, who are set to name their squad on Friday, are due to begin the defence of their Six Nations title against Scotland at Twickenham on February 6.

Jones is expected to name a 28-man selection featuring mostly established international players, with strict COVID-19 bubble arrangements meaning he cannot call up a larger group and allow those needing game time to return to their club sides.

Perth Glory enjoyed an exhilarating start to their 2020-21 A-League season as they beat Adelaide United 5-3 in a thrilling encounter on Wednesday.

Glory's preparations for the season have not been ideal after they were forced to quarantine once their part in the AFC Champions League was over at the end of 2020, but for the most part they looked impressive against Adelaide.

Playing for the first time this year, Glory opened the scoring after 10 minutes as Neil Kilkenny converted a penalty after Bruno Fornaroli was bundled over, and Nick D'Agostino's deflected effort just past the half-hour mark made in 2-0.

Nathan Konstandopoulos punished a defensive calamity to pull one back before half-time, but Fornaroli restored the two-goal advantage in the 51st minute and D'Agostino's header on the hour made it 4-1.

Carlo Armiento's fine finish six minutes from time effectively ended Adelaide's hopes, though the visitors did finish with a flurry as Mohamed Toure and Ben Halloran ensured the scoreline was a little less embarrassing.

In the day's earlier kick-off, the Newcastle Jets saw their miserable start to the season resume with a 2-1 home defeat by Brisbane Roar – Dylan Wenzel-Halls' strike after a clever move proving the decider just past the hour.

That made it four defeats from as many games for the Jets, who are rooted to the foot of the table.

Nikola Jokic has become a more aggressive scorer because he was beaten with a pillowcase full of soda cans by Mike Malone, the Denver Nuggets coach joked.

Nuggets center Jokic had 27 points, 12 rebounds and six assists in three quarters as Denver cruised to a 119-101 victory over the Oklahoma City Thunder at Pepsi Center on Tuesday.

The 25-year-old has had at least a double-double in each of his 14 games this season and is averaging a triple-double of 25.1 points, 11.4 rebounds and 10 assists – all of which represent career highs.

Jokic's best scoring season was 2018-19 when he averaged 20.1 points per game, and Malone gave a light-hearted response when asked what has motivated the Serbian to become more prolific.

He replied: "I locked him in my office one day and I beat him with a pillowcase full of soda cans and I said: 'You've got to score more!'"

In a far more serious tone, Malone continued: "You know how he is, he's a great player, he's playing at an MVP level. You go back to tonight, 27, 12 and six, only one turnover.

"Early on they were playing him one-on-one, and sometimes I get frustrated because I don't think we give him the ball enough, especially when he's being guarded one-on-one.

"Nikola has seen every possible double-team, and so have we as a team. We space the floor correctly and he is so willing to find the open man, and we had great possessions against the double-team.

"He's always going to take what the defense gives him but he is being more aggressive, which is what we need from him."

The Nuggets are 10-2 against the Thunder since 2017-18, their best record against any Western Conference opponent in that span.

Denver's latest victory saw them improve to 7-7 on the season, but they are yet to hold a winning record this season after never being .500 or worse after their first game in the previous campaign.

Zion Williamson needs to "get in shape" if he is to fulfil his potential in the NBA, according to Hall of Famer Karl Malone.

New Orleans selected Williamson with the first overall pick in the 2019 NBA Draft but a meniscus tear in preseason and a season shortened by the coronavirus pandemic meant he played just 24 games in his rookie campaign.

The Duke product is up to 36 games – still less than half the standard season – but former power forward Malone, a two-time MVP who had All-NBA First Team honours on 11 occasions, thinks he need to improve his physique if he is to maximise his abilities.

Williamson is listed at six foot, seven inches and 284 pounds, with Malone pointing to Glen 'Big Baby' Davis as an example of someone who did not live up to their billing due to their size – Davis was 6ft 9in and played at 289 pounds.

"I love Zion Williamson. Zion needs to get into shape. If he doesn't get in shape, we might not ever know his full potential," Malone said on The Players' Tribune's Knuckleheads podcast.

"There's a young man that played at LSU, 'Big Baby' Davis. Big Baby made a comment about eight months ago, he did an ESPN show … he came on that show and he said, 'Look guys, I'm about to get into trouble now with what I'm about to say. I know everybody loves Zion and I love him too. But Zion has the same body type that I had.'

"He was talking about himself. And he said if he doesn't get into shape, we'll never know his full potential. And he did get heat from that."

Williamson had 32 points with five rebounds and three assists as the Pelicans suffered a 118-102 defeat to the Utah Jazz on Tuesday, New Orleans losing for the sixth time in seven games to slip to 5-8 for the season.

This season the 20-year-old is averaging 23.4 points and 8.0 rebounds in 32.6 minutes per game. That ranks him 44th in minutes per game, with his usage percentage of 29.1 enough for 39th in the league.

However, he leads in the league in contested three-points shots per game at 5.9.

Malone added: "I'm still waiting on him to play the whole damn season… and he needs to be averaging 40 minutes per game. Look here, you're a 21, 22-year-old kid. Your a** shouldn't get tired."

The Toronto Blue Jays have reportedly reached a deal to sign star free agent and MLB World Series champion George Springer.

According to MLB.com and ESPN, the Blue Jays have agreed to a six-year, $150million contract with Houston Astros outfielder Springer, pending a physical.

The emerging Blue Jays, who returned to the playoffs last season for the first time since 2016, have been looking to make a splash in free agency as they seek to add experience to an exciting young core of Vladimir Guerrero Jr., Lourdes Gurriel Jr., Bo Bichette and Cavan Biggio, while Toronto also boast the number one right-handed pitching prospect in Nate Pearson.

Toronto had been eyeing the likes of Francisco Lindor and DJ LeMahieu, before the former joined the New York Mets and latter re-signed with American League (AL) rivals the New York Yankees.

But, after recruiting ace Ryu Hyun-jin ahead of the coronavirus-shortened 2020 season, the Blue Jays appear to have landed another big fish as they dream of World Series glory for the first time since 1993.

The reported deal to bring Springer – one of the most coveted free agents this offseason – from Houston would be the largest in Toronto's history, eclipsing Vernon Wells' $126m extension in 2006.

A World Series champion and MVP in 2017, Springer tallied a team-high 14 homers, 37 runs, 50 hits and 32 RBIs with a .265 average in 189 at-bats as the Astros reached the AL Championship Series (ALCS) last season.

Since making his MLB debut with the Astros in 2014, two-time Silver Slugger Springer has amassed 174 home runs, 567 runs, 832 hits and 458 RBIs with a .270 average in 3,087 at-bats.

The 31-year-old and three-time All-Star has hit 19 postseason home runs – tied for fourth on the all-time list.

Nikola Jokic enhanced his MVP credentials with another double-double in the NBA as the Denver Nuggets eased past the Oklahoma City Thunder 119-101.

Two-time All-Star Jokic led the Nuggets with a game-high 27 points, 12 rebounds and six assists in just three quarters on Tuesday.

Jokic – averaging a triple-double in 2020-21 – has posted a double-double in every game he has played for the Nuggets this season, a league-high 14.

The Nuggets outscored the Thunder 66-43 in the second and third quarters to win for the second time in three games, with team-mate Paul Millsap also putting up a double-double of 13 points and 12 rebounds.

Luguentz Dort had 20 points on eight-of-11 shooting for the visiting Thunder in Denver.

The Utah Jazz, meanwhile, stayed hot with a 118-102 victory against the New Orleans Pelicans.

Donovan Mitchell scored 28 points to go with seven rebounds and four assists to lead the Jazz to their sixth successive win.

Rudy Gobert (13 points and 18 rebounds) and Jordan Clarkson (18 points) also made contributions for the in-form Jazz.

Zion Williamson's game-high 32 points were not enough for the Pelicans, who have dropped six of their past seven games.

Nets at Cavaliers

James Harden, Kevin Durant and the star-studded Brooklyn Nets (9-6) will look to stay hot when they visit the Cleveland Cavaliers (6-7) on Wednesday.

Portland Trail Blazers center Jusuf Nurkic will be re-evaluated in six weeks after undergoing wrist surgery.

Nurkic suffered a wrist fracture in Portland's 111-87 NBA defeat to the Indiana Pacers last week.

Trail Blazers president of basketball operations Neil Olshey announced on Tuesday that Nurkic had surgery to repair the fracture in his right wrist.

Nurkic will wear a splint for four weeks as he faces at least six weeks on the sidelines.

The 26-year-old Bosnian is averaging 9.8 points, 7.7 rebounds and 2.8 assists per game for the Trail Blazers (8-6) this season.

Roma head coach Paulo Fonseca said the club will discuss the error made in the Coppa Italia upset against Spezia after the club used six substitutes.

Spezia shocked Roma 4-2 after extra time in the Italian capital, where Fonseca's side capitulated and sensationally made one substitution too many in the last 16 on Tuesday.

Roma would have been eliminated by default even if they won at home to Spezia after Fonseca introduced Ibanez for Pedro in extra time, having already made five changes to his line-up.

Fonseca's Roma believed they could use six substitutes – an additional change in extra time as seen in cup competitions – but that was not the case in the Coppa Italia.

Asked about the mistake at Stadio Olimpico, under-fire boss Fonseca – who oversaw a humiliating 3-0 derby loss to Lazio in Serie A on Friday – said post-match: "If there is an issue, we have time to discuss that internally. If there is."

Fonseca was looking to bolster his defence after centre-back Gianluca Mancini was shown a second yellow card in the 91st minute, and goalkeeper Pau Lopez saw red just seconds later.

With Roma down to nine men, Spezia capitalised on their numerical advantage as Riccardo Saponara and Daniele Verde struck in extra time.

Roma had rallied from 2-0 down inside 15 minutes to force extra time via Lorenzo Pellegrini's 43rd-minute penalty and Henrikh Mkhitaryan's fine finish with 17 minutes remaining.

Hosts Roma conceded two goals during the first 15 minutes of play, in all competitions, for the first time since January 2020 as they were eliminated in the Coppa Italia round of 16 for just the third time in the last 20 seasons – twice against Spezia.

It was also the first time since 2015-16 that Roma played extra time in the Coppa Italia.

"We had a bad start to the game; the penalty, and then another moment that's hard to really understand," Fonseca said. "But the team responded, they played well, they created chances and it could have been a different result.

"We missed so many chances and so then, with two men sent off, it all became much harder."

"It's a tough moment. We wanted to go further in the cup, but I can't say anything bad about the attitude of the players. We have to now focus on the next game," Fonseca continued.

Pressure is mounting on Fonseca, who was appointed in 2019, but the Portuguese tactician said: "My future has been up for discussion ever since I got here. I am encouraged by the position we have in the league right now – it's where we want to be – and I have confidence in my team. But when we don't win I am always being discussed. I have to stay focused on my job."

Roma – winless in three matches across all competitions having conceded nine goals – are fourth in Serie A, nine points behind leaders Milan through 18 games.

RB Leipzig head coach Julian Nagelsmann said football and the NFL can learn from each other as he revealed his admiration for the Green Bay Packers.

Nagelsmann – one of Europe's finest tacticians – said he is a fan of American football after hailing the "extraordinary" discipline of the league's players.

As Aaron Rodgers and the Packers prepare to face Tom Brady's Tampa Bay Buccaneers in the NFC Championship Game on Sunday, Leipzig boss Nagelsmann insisted the two sports can learn from each other.

"Our general manager Timmo Hardung is a huge Green Bay Packers fan, so that's rubbed off on me a bit," Nagelsmann told reporters ahead of Leipzig's match against Union Berlin on Wednesday.

"My heart beats for them a bit, their history is very interesting and different to most of the other clubs in the NFL."

Nagelsmann added: "It's a very interesting sport. And I think we can learn a lot from American football in soccer, and our players can learn a lot from it as well. Especially in terms of their discipline in studying and executing the team's playbook. I definitely think that's an area that soccer can improve on.

"The game is based on an unbelievable number of plays, and the players have to understand a lot of specific terms and then act accordingly out on the field. They have to do all that extremely quickly, which is extraordinary."

"You could see in the games that there were one or two tricks – I'd like to see a bit more of that. 'Hitch and Pitch' I think it's called. That worked quite well in the play-offs a couple of times," he continued.

"So American Football can learn from football, but definitely vice versa too. And if any NFL coaches would like to have a chat about it all, feel free to get in touch!"

Leipzig – Champions League semi-finalists last season – are third and four points adrift of Bundesliga leaders Bayern Munich after 16 matches in 2020-21.

Eintracht Frankfurt head coach Adi Hutter hailed the "greatness" of Luka Jovic following his stunning start to life back in the Bundesliga.

Jovic scored two goals in his return for Eintracht last week after re-joining the German club on loan until the end of the season, having endured a difficult period at LaLiga champions Real Madrid.

The Serbia international only scored twice in 32 appearances under Madrid coach Zinedine Zidane in the Spanish capital, where he arrived for €60million in 2019.

But Jovic came off the bench and scored twice in 28 minutes as Eintracht defeated Schalke 3-1 in the Bundesliga on Sunday.

Jovic matched his Madrid tally in the stunning cameo for Eintracht, where the 23-year-old netted 27 goals in 2018-19 before making the move to the Santiago Bernabeu.

Previewing Wednesday's showdown with Freiburg, Hutter discussed Jovic and his partnership with Eintracht star Andre Silva.

"Strikers are always a bit egotistical, but when it is about the team or Eintracht Frankfurt, everyone puts their ego aside," Hutter told reporters.

"Luka [Jovic] does that sovereignly. When you bring back someone who had his best time here and scored 27 goals in a year, then gets loaned out and scores two goals in 32 games, and then comes back and scores two goals in about 25 minutes, it's logical that the attention is more on that than on Andre Silva's 12th goal of the season.

"But when you hear Luka's statements that it is an honour for him to play in a team with Andre, it shows the greatness and character of Luka and it shows the respect he has for Andre Silva. I have spoken to Andre before and he said that competition is very important for him and that quality in the team is important. That doesn't bother him at all.

"I also can't imagine that Andre Silva, who has previously played for Milan and Sevilla, can't handle competition. I think he has also seen that Luka is another striker with whom he can harmonise.

"As always, I'm keeping a low profile. He [Luka Jovic] has shown in this short season that he is an absolute world-class striker with a high calibre. We'll leave it open as to whether he'll play from the start [against Freiburg]."

Silva's goal to open the scoring against Schalke was his 12th of the season, taking him level with Borussia Dortmund's Erling Haaland – only Bayern Munich star Robert Lewandowski (21) has more in 2020-21.

Eintracht – eighth in the standings – are the only team to win all three of their Bundesliga games in 2021 and have now won four on the bounce in the league for the first time since early 2019.

Philadelphia 76ers head coach Doc Rivers said he "expects" All-Star Joel Embiid to return for Wednesday's showdown with rivals the Boston Celtics.

Embiid sat out Saturday's 106-104 loss to the Memphis Grizzlies due to right knee soreness, and the three-time NBA All-Star would have been absent again if Sunday's clash against the Oklahoma City Thunder was not postponed.

But Embiid took part in practice on Tuesday and Rivers is bracing for the 76ers center to make a comeback as two of the Eastern Conference's best teams meet midweek.

"I do expect him to go," Rivers said. "He was in and out of practice today, we didn't let him do a lot of stuff, but he looked pretty good."

Embiid – an early MVP candidate – is averaging 25.0 points, 11.5 rebounds and 2.9 assists per game for the 76ers (9-5) this season.

The 26-year-old has relied on his jump shot even more this season but has instead taken most of them inside the arc.

Embiid – whose 76ers are 9-2 when he plays and 0-3 without him this term – has seen his jump shot field-goal percentage rise 8.2 per cent to 45.6 per cent in 2020-21.

The 76ers have been hampered by the coronavirus pandemic, with Philadelphia left shorthanded since Seth Curry's positive COVID-19 test on January 7.

Philadelphia and Oklahoma City were scheduled to meet at Chesapeake Energy Arena on Sunday, but the 76ers did not have the required eight players available because of contact tracing with the team.

But the 76ers – minus Curry – were back to full strength for Tuesday's practice, much to the delight of Rivers.

"It was nice," said Rivers. "We're not one of those teams that have the luxury of being together for several years. We have so many new bodies, a new system, new coach, everything.

"To have all those games and no practice and then to have all those guys out, and even your shoot arounds are not what you expect them to be, it absolutely has affected us."

Rivers added: "Even on a couple of days we have a somewhat of a practice, we didn't have enough guys to practice. Today was a day we had enough guys, we can change, we can sub in practice and put different units on the floor."

Kyrie Irving is ready to play again and looks set to line up for the Brooklyn Nets on Wednesday after a run of seven missed games.

The six-time All-Star has been absent for personal reasons and received a hefty punishment for breaching NBA health and safety protocols while away from the team.

That was imposed after Irving was filmed apparently attending a large birthday gathering while not wearing a mask.

But Irving confirmed on Tuesday he is back in training with the team, putting him in line to face the Cleveland Cavaliers on Wednesday evening.

Explaining his absence, Irving said on Tuesday: "There's been a lot of family and personal stuff going on, so I just want to leave it at that."

Coach Steve Nash said: "I expect him to play tomorrow. It's great to have Kyrie back in the building. We've missed him and I'm excited to get him back out on the floor."

Irving was fined $50,000 by the NBA and docked over $800,000 in salary for the two games he missed while ordered into quarantine by the league.

He will have a notable new teammate on his return to action, with the Nets having landed James Harden from the Houston Rockets.

Harden, an eight-time All-Star, bolsters the scoring power already in Brooklyn's ranks, with Irving averaging 27.1 points per game in his seven outings for the team this season and Kevin Durant posting 30.6 PPG in 11 appearances.

The new arrival meets with Irving's approval.

"I'm very excited to have James here," Irving said. "We're just moving on to the next phase of developing as a team, building some camaraderie and having fun.

"It's just really exciting to be able to play with great players."

He spoke of the experience that Harden brings and said: "Adding that to our locker room is going to be great for us."

Without Irving, the Nets have won five of their past seven games to improve to 9-6 for the season.

The New York Mets fired general manager Jared Porter on Tuesday, a day after it was reported he sent unsolicited text messages and lewd images to a female reporter in 2016.

The Mets hired the 41-year-old Porter only last month, but new team owner Steven Cohen announced his firing on Twitter.

Cohen wrote: "We have terminated Jared Porter this morning. In my initial press conference I spoke about the importance of integrity and I meant it. There should be zero tolerance for this type of behavior."

In response to a question about the firing of Porter, Cohen added: "No action would of set a poor example to the culture I'm trying to build."

Shortly after Cohen’s tweet, the Mets issued a statement from team president Sandy Alderson.

It read: "The New York Mets have terminated general manager Jared Porter, effective immediately. Jared's actions, as reflected by events disclosed last night, failed to meet the Mets' standards for professionalism and personal conduct."

Porter was the Chicago Cubs' director of professional scouting in 2016 when ESPN said he began sending unsolicited and inappropriate text messages and images to the reporter after meeting her in June of that year.

He has yet to make a public comment on ESPN's allegations.

Porter spent the next four seasons with the Arizona Diamondbacks as their senior vice president and assistant general manager.