Over the past couple of seasons, Trent Alexander-Arnold has essentially set the standard for full-backs in the Premier League.

Not only has he been a dependable part of a generally mean defence, but his effectiveness in the final third has helped mark him out from the rest.

A dead-ball specialist, comfortable on the ball and a fine passer, many have even suggested his long-term future could be further up the pitch in midfield – comparisons in this regard with the likes of Philipp Lahm are understandable.

But the adulation has been rather quieter this season. Indeed, he has even been the target of criticism on occasion, which is an awkward position to be in ahead of a huge top-of-the-table clash with bitter rivals and league leaders Manchester United on Sunday.

So, is Alexander-Arnold genuinely having a poor season? Or is he just the victim of his own high standards?

THE KNIVES ARE OUT

With Liverpool not running away with the Premier League title this term, perhaps it was inevitable that certain players were going to start being targeted with harsh words.

The focus on Alexander-Arnold seemingly became most intense after the Reds' 1-0 defeat to Southampton at the start of January.

Many sections of the British media zoned in on the fact Alexander-Arnold lost possession 38 times in the match, more than anyone else, yet virtually all coverage neglected to mention that such statistics are heavily skewed when relating to creative players who are far more likely to lose the ball due to the greater risk involved in their roles.

In isolation, such a statistic proves little. For example, Kevin De Bruyne lost possession 34 times in a game against Watford last season, yet he also had a telling impact with an assist from six chances created. In his entire Premier League career, the Belgian has only ever made more key passes in a single match eight times.

Although focusing on that part of his game may have been unfair, former Liverpool full-back Jose Enrique acknowledged Alexander-Arnold does appear to be a little short of his best, though he is adamant dips in form are normal and could even be explained by fatigue in a packed schedule.

"All of us are humans, you all have up and downs, we don't know what's going on in his life," Jose Enrique told Stats Perform News. "It's probably going amazing for him but at some point, your performance goes up and down. It's very difficult to do what [Lionel] Messi and [Cristiano] Ronaldo have done [in terms of consistency], it's just them, no one else [can be at such a level for so long].

"At some point in the season, you always underperform. It's normal. At the end [of games] you are more tired, you have many games under your legs. We are talking about international players, players playing at international level as well, Champions League, so it's many games."

STATS SUGGEST A SLUMP

The fact is, Alexander-Arnold has been less effective for Liverpool this season, and the stats back it up.

Across all competitions, the England international has four assists in 19 games at a rate of one every 392.8 minutes. Last term, he laid on 15 in 49 games, or one every 266.1 minutes.

In the Premier League, his frequency drops to 609.5 minutes per goal involvement, having been at 186.8 last term. On the opposite side of Liverpool's defence, Andy Robertson is proving a greater threat (one assist or goal every 255 minutes).

If we look a bit deeper, Opta data tells us Alexander-Arnold is playing fewer passes into the box per 90 minutes (12) than last term (14.4), while his open-play crosses are also down to 5.2 each game from 6.7 despite average position maps showing very little change in his role or the areas he operates in this term.

But, when considering his attacking output, it is worth noting that seven of his 13 Premier League assists last season came from set-pieces – this could partly explain his shortfall in productivity.

After all, he is taking almost 50 per cent fewer corners per game (down from 4.6 to 2.7) in 2020-21, while his key passes from set-pieces is 0.9 per 90 minutes after being 1.1 in 2019-20.

One might expect this to be a reflection of Liverpool simply having fewer corners, but that isn't the case – in fact, their average of 6.7 per game is identical to last season, he just is not taking them as often.

SUFFERING FROM A LACK OF COMPETITION?

Remember, though, this is comparing Alexander-Arnold to a time when he was in an almost unstoppable side that scored for fun and did not have something of a defensive injury crisis.

If we look at his form in the context of his Premier League contemporaries this term, his critics might be a little surprised.

Indeed, his 25 chances created and 162 passes into the box are second only to Robertson (32 and 169 respectively) among defenders, while Harry Maguire is the sole defensive player with more efforts on goal (21) than Alexander-Arnold (20).

It's a similar story with respect to crosses, as his tally of 70 is the fourth highest for a defender. Again, Robertson – who seems to be thriving even more this season – tops the list with 92.

Clearly Alexander-Arnold is still performing at a high standard, though Jose Enrique suggests a lack of competition in the right-back role could be another factor in his slight dip in form.

"I believe he's 22 now, he's won everything he can win as a player but maybe he needs more competition," the Spaniard added. "I believe Neco Williams is a good player, but obviously you can't compare. That's the reality. Neco is still growing, we don't know in the future how he's going to be. That's why he [Jurgen Klopp] puts [James] Milner there sometimes, I believe, to make a point.

"Sometimes it happens as well in players, and he will come back to his best. He's so important for us. Apart from De Bruyne, I don't see any other right foot like his. He puts the ball wherever he wants with his right foot, he's incredible. But like I said, he's a human being and he's not his best right now, but I'm sure against United he will sort out everyone, I'm sure."

There's no time like the present.

Stephen Curry's 35 points were not enough for the Golden State Warriors, while the Houston Rockets started the post-James Harden era with a win.

Curry was 14-of-23 from the field and five-of-11 from three-point range, but the Warriors fell to the Denver Nuggets 114-104 on Thursday.

Nuggets star Nikola Jokic dominated with a triple-double of 23 points, 14 rebounds and 10 assists.

Denver had seven players in double-digits for points as they improved to 6-6 – the same record the Warriors now hold.

After trading Harden to the Brooklyn Nets, the Rockets recorded a 109-105 win over the San Antonio Spurs.

Christian Wood had a double-double of 27 points and 15 rebounds for the Rockets, who were without John Wall (knee).

Milton magical for Sixers, Boucher lifts Raptors

Shake Milton had 31 points off the bench in the Philadelphia 76ers' 125-108 win over the Miami Heat. He was 11-of-15 from the field and three-of-four from three-points range.

Ben Simmons notched a triple-double of 10 points, 12 assists and 10 rebounds for the 76ers. Only Oscar Robertson (75 games) and Magic Johnson (190 games) have reached 30 career triple-doubles quicker than Simmons (228).

Chris Boucher had 25 points and 10 rebounds off the bench to help the Toronto Raptors beat the Charlotte Hornets 111-108.

A huge game from Domantas Sabonis (23 points and 15 rebounds) saw the Indiana Pacers past the Portland Trail Blazers 111-87.

After another four blocks and one steal, Pacers center Myles Turner reached 50 blocks and 18 steals through 12 games. He is the first player to have at least that many blocks and steals through his first 12 games of a season since David Robinson in 1992-93, as per Stats Perform.

Job done for 76ers despite Embiid struggles

Joel Embiid has enjoyed a superb start to the season, but the 76ers star struggled against Miami. He was three-of-eight from the field for just nine points in 23 minutes.

Bridges brilliance

Miles Bridges produced a huge dunk during the Hornets' loss to the Raptors. He finished with 12 points.

Thursday's results

Philadelphia 76ers 125-108 Miami Heat
Toronto Raptors 111-108 Charlotte Hornets
Houston Rockets 109-105 San Antonio Spurs
Indiana Pacers 111-87 Portland Trail Blazers
Denver Nuggets 114-104 Golden State Warriors

Pelicans at Lakers

The Los Angeles Lakers (10-3) are riding a four-game winning streak ahead of hosting the New Orleans Pelicans (4-6) on Friday. LeBron James is averaging 24.3 points, 8.1 rebounds and 7.5 assists per game to begin the campaign.

Ben Simmons insisted he was unfazed about talk over his future with the Philadelphia 76ers after James Harden joined the Brooklyn Nets.

Simmons was the subject of trade rumours as the 76ers were linked to Harden, whose move from the Houston Rockets to the Nets was confirmed on Thursday.

But, after the 76ers' 125-108 win over the Miami Heat on Thursday, the 24-year-old said it was just part of the game.

"This is a business, things like that happen," Simmons told a news conference.

"The only thing I can control is how I approach my workouts, the games and my day-to-day things.

"I'm just trying to be professional and do the right thing and help my team get wins."

Asked if he was happy to be in Philadelphia, Simmons responded: "Of course."

Simmons posted a triple-double of 10 points, 12 assists and 10 rebounds in the win over the Heat.

It was his 30th triple-double in the NBA. Only Oscar Robertson (75 games) and Magic Johnson (190) have managed that quicker than Simmons (228).

Philadelphia head coach Doc Rivers was delighted with Simmons' performance as the 76ers improved to 9-4.

"I thought tonight is who he has to be every night. I loved the way he played. I loved how he played under control, didn't force it, took gaps when they were there," he said.

"He was a presence on the floor for us and not just on the offensive end but on the defensive end as well and that takes us to a different level when he plays like that."

Brooklyn Nets general manager Sean Marks is confident Kevin Durant, Kyrie Irving and James Harden will gel as they work towards a "common goal".

The Nets confirmed on Thursday they had completed a blockbuster trade to land eight-time All-Star Harden from the Houston Rockets.

Questions have been asked over whether Durant, Harden and Irving can work together, but Marks is confident.

"These guys have given us the right answers. They've said hey, they want to play together, they can see this fitting," he told a news conference.

"They're at a time in their careers – I don't want to speak for each one of them because I let them have their own their own voice and their narrative around this – but I think they understand that there's without a doubt going to be some nights where one or two need to sacrifice for the other and so forth. But I think they're all looking for a common goal.

"We’re all looking for that common goal, as I've said before, is to be the last team standing. I think when you have a group that is willing to sacrifice, and play hard, play together on the court, and they already have a relationship, a prior relationship to this, so I think that will help."

Harden, Durant and Irving all rank in the top 10 in the NBA in scoring average since the latter's rookie season in 2011-12 (minimum 500 games).

Durant or Harden have won seven of the past 11 NBA scoring titles. No Brooklyn qualifier has ever finished higher than fifth in the league.

Marks said the opportunity to land a player like Harden came at a good time for the Nets.

"The timing was right for us. And fortunately, any time you get an opportunity to acquire or try to acquire a player of this calibre it's something you do look hard at [and] is something we did," he said.

"The process sped up very, very rapidly and very quickly over the last 48 hours."

Zinedine Zidane said missing out on a Supercopa de Espana final showdown with Barcelona was not a failure for Real Madrid after they were beaten 2-1 by Athletic Bilbao.

Raul Garcia's first-half double was enough to knock the holders out and end their nine-match unbeaten run at La Rosaleda on Thursday.

Karim Benzema's 13th goal of the season gave Los Blancos hope after Marco Asensio hit the woodwork twice, but the Basque side held on to secure only a second win over the LaLiga champions in 23 matches and a first victory under new coach Marcelino.

Madrid boss Zidane felt his side fell short of the high standards he expects in the first half, but he will not be dwelling on the setback.

He said: "Our first half was difficult, we didn't get into the game well, they scored two goals. They had two chances and two goals. When you are two goals down it is always difficult.

"Then we had a better second half, we created chances, we had several, scored a goal, but could not score a second."

He added: "It is not a failure. Failure is not trying, not giving everything on the field. Life is like that, you can't always win. What we always try to do is win, but you can't always."

Madrid had not lost since December 1 and Zidane expects his side, who have a weekend off before facing Alcoyano in the Copa del Rey next Wednesday, to respond after missing out on another trophy.

The former France playmaker said: "We had a good run and now it's two draws and one loss [in their past four games]. We have to keep working to change the dynamics quickly.

"The outside will be the same as always, what we can do is keep working and move this forward as a team."

Eden Hazard again failed to show what he is capable of, hitting the target only once from three attempts and making just one key pass.

The Belgium forward has scored just two goals and not provided an assist in an injury-hit campaign, but Zidane remains confident he will come good.

Zidane said: "He must regain confidence, play a good game, score a goal, something different. We know the player he is and we have to be patient, but he is working. We are with him, we have to be patient."

Athletic and Barca do battle for the trophy at Estadio de La Cartuja on Sunday.

Raul Garcia scored twice as Athletic Bilbao secured a rare 2-1 win over holders Real Madrid to set up a Supercopa de Espana final against Barcelona.

Athletic had won only one of their previous 22 matches against the LaLiga champions but beat them for the first time since March 2015 at La Rosaleda on Thursday to hand Marcelino his first victory.

Raul Garcia was set up by Dani Garcia for the opening goal and struck again from the penalty spot to stun Madrid in the first half.

Karim Benzema reduced the deficit after Marco Asensio struck the woodwork twice, but Bilbao held on to end Madrid's nine-match unbeaten run and ensure they will do battle with Barca for the trophy at Estadio de La Cartuja on Sunday.

Athletic did not allow Madrid to settle and they were in front in the 18th minute when Dani Garcia picked up a sloppy pass from Lucas Vazquez and threaded an incisive ball through for the unmarked Raul Garcia to slot beyond Thibaut Courtois.

Having flashed a venomous shot wide as the Basque side continued to press Los Blancos high up the pitch, the experienced midfielder was on target again seven minutes from time.

Another lapse from Vazquez proved to be costly, the defender bundling over Inigo Martinez and Raul Garcia sending Courtois the wrong way with an expertly taken spot-kick seven minutes before the break.

Nacho Fernandez replaced Raphael Varane at half-time and Iker Muniain ought to have put Athletic three goals to the good when he nodded Oscar De Marcos' cross wide of the near post from close range.

Asensio twice came close to halving the deficit in quick succession, rattling the near post from close range before striking the crossbar with a rasping long-range drive.

Benzema pulled one back when he was ruled onside following a VAR check after the flagged was initially raised with 17 minutes remaining.

France striker Benzema had the ball in the back of the net again but this time he was ruled to be offside after Courtois denied Asier Villalibre and Sergio Ramos headed just wide as Athletic held on in a tense finale.

Madison Keys is set to miss the Australian Open after testing positive for coronavirus.

The 2017 US Open runner-up announced on Thursday that she contracted COVID-19 before she was due to fly out for the first grand slam of the year.

Keys did not state she will definitely miss the major, which starts on February 8, but it appears the American will not make the trip to Melbourne.

The American wrote on Instagram: "Hi everyone, I wanted to let you know that I unfortunately tested positive for COVID-19 before I was supposed to fly to Australia.

"I'm very disappointed to not be able to play in the coming weeks after training hard in the off-season and knowing Tennis Australia and the tours did so much to make these events happen.

"I am self-isolating at home and will continue to follow all the necessary health precautions. I look forward to being back on tour next month."

It was revealed earlier in the day that three-time major winner Andy Murray has also tested positive for the virus, but still hopes to play in the Australian Open.

Meanwhile, world number 50 Tennys Sandgren was cleared to board a flight from the United States bound for Melbourne despite revealing he returned a new positive coronavirus test this week. 

The American, twice a quarter-finalist at Melbourne Park, initially posted to social media on Wednesday that he had tested positive for the virus for a second time. 

Although his first instance of having the illness was recorded in November, the 29-year-old's participation in the tournament appeared to be in doubt. 

But as he continued to update followers through the day, it emerged he had been allowed to board his flight. 

Players will only be allowed into Australia with proof of a negative test just prior to departure, or with approval to travel as a recovered case at the complete discretion of an Australian government authority.

Anyone wanting to travel out for the tournament who previously tested positive is required to provide additional and highly detailed medical information as proof they are a recovered case and no longer infectious or a risk to the community.

James Harden has been thanked by the Houston Rockets after being traded to the Brooklyn Nets.

Three-time NBA scoring champion Harden has linked up with former Oklahoma City Thunder team-mate Kevin Durant and Kyrie Irving in Brooklyn, who have gone all in on a championship run by bringing in the 2018 MVP.

The Nets gave up Jarrett Allen, Taurean Prince, Caris LeVert, Radions Kurucs, three first-round draft picks (2022, 2024 and 2026) and four first-round pick swaps (2021, 2023, 2025 and 2027) to acquire Harden.

Allen and Prince were sent to the Cleveland Cavaliers, who provided Houston with Dante Exum and a 2022 first-round pick via the Milwaukee Bucks. Brooklyn received a 2024 second-round pick from the Cavs to complete the deal.

The Rockets are expected to send LeVert and a 2023 second-round pick to the Indiana Pacers in exchange for two-time All-Star Victor Oladipo.

Harden requested a trade prior to the start of the season and following a 117-100 loss to the Los Angeles Lakers on Tuesday he said: "It's something that I don't think can be fixed."

The Rockets granted their franchise player his wish on Thursday and owner Tilman Fertitta praised him for his achievements in Houston.

"On behalf of the entire Rockets organisation and the City of Houston, I'd like to thank James Harden for an amazing eight-plus seasons in a Rockets uniform," said Fertitta in a statement.

"James has provided us with so many great memories as we've watched him grow from Sixth Man of the Year to a perennial All-Star and MVP.

"My family and I also want to thank James for his many off the court contributions, including generous charitable donations and multiple annual community events.

"We wish James the best of luck and will always be grateful for the memories."

Harden is second on the Rockets' all-time scoring list with 18,365 points, only trailing Hakeem Olajuwon (26,511) – a two-time NBA champion in Houston.

He averaged 29.6 points, 6.0 rebounds and 7.7 assists during his time with the Rockets.

Harden led them to the Western Conference Finals in 2014-15 and 2017-18, losing to the Golden State Warriors on both occasions.

LaMelo Ball's NBA career with the Charlotte Hornets got off to a subpar start. 

In fact that might just be a generous description of his NBA debut. It was downright brutal. 

The third overall pick of this year's draft played a scoreless 15 minutes in his first game, missing all five of his field-goal attempts in Charlotte’s 121-114 loss to the Cleveland Cavaliers on December 23. 

Not only did he fail to score, the highly-touted playmaker also turned the ball over three times, becoming only the second player in the last 35 years to finish without a point while taking at least five shots with three or more turnovers in 15-plus minutes in their NBA debut, joining the Golden State Warriors' Brandon Williams in 1998. 

While he got off to a shaky start, things have since gone much better. 

Better actually might not be kind enough in describing his recent play. He's been outstanding. 

On the onset of the 2020 draft, the 6-foot-7 point guard was widely considered to have the highest ceiling of all the prospects. An adept ball-handler, scouts marvelled at his passing, court vision and his ability to push the ball up the court. 

Though Ball possesses an immense skillset and has a comprehensive understanding of the game, making the jump from Australia's National Basketball League to the NBA would admittedly take time. 

It took him all of one week. 

With 22 points, eight rebounds and five assists in a win over the Dallas Mavericks on December 30, he became the first player in the last 35 years to reach those numbers in just his fourth game, and he's continued to stuff the stat sheet with impressive numbers. 

Since then, he's had two more games with 15 or more points, eight or more rebounds and five or more assists. Only four other players have had more such games in that span – the Denver Nuggets' Nikola Jokic (six), Mavericks' Luka Doncic (five), New York Knicks' Julius Randle (five) and Los Angeles Lakers' LeBron James (four). 

Over the course of three games from January 8-11, he racked up 42 points, 36 rebounds and 27 assists, joining Ben Simmons in 2017 and Lamar Odom in 2000 as the only rookies in the last 35 years with at least 40 points, 35 boards and 25 assists over a three-game span. 

In the middle game of that three-match stretch, Ball made history. At 19 years and 140 days, he became the youngest player ever to record a triple-double by notching 22 points, 12 rebounds and 11 assists in Saturday's win over the Atlanta Hawks. 

Despite stumbling out of the gate with his forgettable debut, he still reached the 10-game mark with 131 points, 63 rebounds and 59 assists. In the last 35 seasons, only two other rookies have reached those numbers after 10 games – James in 2003 and Simmons in 2017. 

Ball's passing has been as advertised. He's finding his open team-mates and setting them up for success. 

Among the 100 players with at least 30 assists, he has the league's 10-best assist rate – the estimation of percentage of field goals made by team-mates while he's on the floor. At 36.8 per cent, Ball sits just a bit back of James, whose eighth at 37.6. 

With 71 assists on the season, Ball has eight fewer assists than Devonte' Graham for the most on the Hornets. He does, however, lead Charlotte with 84 rebounds, and if he does surpass Graham and finish the season leading the team in both rebounds and assists, he'll join Michael Jordan in 1984-85 and Blake Griffin in 2010-11, as the only rookies in the last 40 years to lead their team in both categories. 

Not only is Ball flourishing in the part of his game many thought he would eventually excel in, he is also finding success in areas that were believed to be some of his biggest weaknesses – shooting and defense. 

After shooting a dreadful 24 per cent from 3-point range in Australia's NBL, Ball is making a respectable 33.9 per cent of his 3s. Nothing outstanding, but the league average on 3s is 36.6 per cent. 

He’s also showing a proficiency at knocking down shots just inside the arc. His 50 per cent shooting on mid-range jumpers is tied with seven others for 17th in the NBA among those with at least 100 field-goal attempts. 

Defense was another area that many expected would take Ball time to grasp and be competent in, but he’s already proven to be up to speed, leading all rookies with 22 defensive stops. 

Not only does he lead all first-year players in defensive stops, he also leads all rookies in points (143), rebounds (84), assists (71), as well as steals (18). 

If Ball continues to thrive on the court and finishes the season leading all rookies in points, rebounds and assists, he’ll become just the seventh player in NBA history to accomplish that feat, joining Elgin Baylor (1958-59), Wilt Chamberlain (1959-60), Oscar Robertson (1960-61), Walt Bellamy (1961-62), Alvin Adams (1975-76) and Michael Carter-Williams (2013-14). 

Not surprising, but each of the previous six won the Rookie of the Year Award. 

Playing at a level few rookies have before him, Ball is the early frontrunner to win this season's award. 

Good thing for him the trophy isn't handed out after one game. 

Three candidates are in the running to became Barcelona president after Emili Rousaud withdrew from the electoral process.

Rousaud announced on Thursday that he is no longer in the frame to replace Josep Maria Bartomeu, who stepped down from the role in October.

Joan Laporta, Victor Font and Toni Freixa are the trio of candidates who are in the race to be named president.

Laporta, the favourite to return for a second term, had 9,625 signatures validated, while there were 4,431 and 2,634 for Font and Freixa respectively in the validation process for an election that will take place on Sunday January 24.

Rousaud had stated he no longer wants to be involved in a "dirty war" for the right to succeed Bartomeu.

Marca quoted him as saying: "It was a day of impressive dignity because, to my surprise, the majority decision was not to agree to join another candidacy, because we cannot tolerate the dirty war and we prefer to stay out.

"Our sporting and economic proposals were the best."

Ferrari driver Charles Leclerc has tested positive for coronavirus, the team have confirmed.

The 23-year-old was already isolating having been in close contact with someone who had contracted COVID-19.

Ferrari said Leclerc is isolating at home in Monaco and is displaying mild symptoms.

A team statement read: "Scuderia Ferrari Mission Winnow driver Charles Leclerc has tested positive for COVID-19.

"In accordance with the team's protocols, Charles is tested regularly and yesterday, the result from his latest test came back positive. 

"Charles notified us immediately and has informed everyone he has been in close contact with in the last few days.

"He is currently feeling ok with mild symptoms and is now self-isolating at home in Monaco."

Leclerc added on his Instagram stories: "Hello guys. I hope you are all staying safe.

"I want to let you know that I have tested positive for COVID-19. I am regularly checked according to my team's protocols.

"Unfortunately, I learned that I have been in contact with a positive case and immediately went into self-isolation, notifying anyone I had contact with. A subsequent test I took has come back positive.

"I am feeling okay and have mild symptoms. I will remain in isolation in my home in Monaco in compliance with the regulations set by the local health authorities.

"Stay safe and take care."

World champion Lewis Hamilton tested positive towards the end of the 2020 F1 season, while Lance Stroll and Sergio Perez have also previously missed time due to coronavirus.

The Australian Open has hinted Andy Murray will not be able to compete in Melbourne following his positive test for coronavirus.

Murray, a five-time finalist at the Australian Open, remains in good health and is isolating at home.

The three-time grand slam winner is still hoping to play and travel to Australia later than planned.

However, a statement from the tournament cast serious doubt on his involvement, with Murray – ranked 123rd in the world – having initially been granted a wildcard to play.

The statement read: "Andy Murray has advised that he has tested positive for COVID-19 and is isolating at home in the UK.

"Unfortunately, this means that he will be unable to join the official AO charter flights arriving in Australia in the coming days to go through the quarantine period with the other players.

"The AO fans love Andy, and we know how much he loves competing here in Melbourne and how hard he'd worked for this opportunity."

The first grand slam of the year is starting three weeks later than it normally would on February 8 due to the complications of players flying into Australia amid the ongoing coronavirus pandemic.

Tournament organisers are putting on 15 chartered flights, which will operate at 25 per cent capacity, to bring players to the tournament.

Before boarding, competitors must test negative and will undergo a series of tests once in the country, while undergoing a 14-day quarantine period in Melbourne.

It was after a first-round defeat at the Australian Open two years ago that Murray stated his career might be over due to an ongoing hip injury.