Lionel Messi scored his 650th goal for Barcelona with a sumptuous free-kick against Athletic Bilbao on Sunday.

The Argentina international whipped a shot into goalkeeper Unai Simon's top-left corner from 25 yards midway through the first half to put Barca 1-0 up in their LaLiga clash at Camp Nou.

Messi was in the headlines earlier in the day when leaked details of his eye-watering contract emerged.

A report by El Mundo claimed the deal Messi signed in 2017, which expires at the end of this season, is worth more than €555million.

The six-time Ballon d'Or winner scored his first goal for Barca in May 2005 at the age of 17, beautifully lobbing Albacete goalkeeper Raul Valbuena.

He has gone on to become far and away the club's record scorer, overtaking Cesar Rodriguez's previous mark of 232 in 2012.

Mauricio Pochettino gave a damning assessment of Paris Saint-Germain's 3-2 Ligue 1 defeat at Lorient, declaring the performance to be "an accident".

PSG had the chance to return to the top of the table on Sunday and were on course to do so after a Neymar penalty in either half overturned Laurent Abergel's opener.

But Yoane Wissa netted a superb solo strike in the 80th minute before fellow substitute Terem Moffi streamed into the PSG half unchallenged to seal the points after an injury-time breakaway.

"We never got into the rhythm of the match, except when we managed to score the goal for 2-1," Pochettino told reporters.

"We are really sad with the result. We were too slow in the game, we gave Lorient too many options. We wanted to do something else but we did not succeed."

The defeat was PSG's first since Pochettino was appointed as Thomas Tuchel's successor at the Parc des Princes and the former Tottenham boss conceded there is plenty of work ahead as he tries to shape the team to his specifications.

"It is a problem of collective coordination," he said. "At 2-2, we wanted to go for the victory, which caused disorganisation and ended in our defeat.

"We are constantly looking to improve, to work. It's an accident, like can happen in football. We hope to be better in the next game."

PSG's central midfield two of Leandro Paredes and Danilo Pereira struggled to stamp their authority on the contest despite completing 92.2 and 95.5 per cent of their respective passes.

Marco Verratti was unavailable after testing positive for coronavirus but Pochettino refused to cite the Italy international's absence in mitigation

"Of course Marco is an important element, but you have to know how to play without certain players," he added. "It shouldn't be an excuse."

Lille subsequently beat Dijon 1-0 to move three points clear of PSG at the top, with Pochettino's side down in third behind Lyon.

Luis Suarez scored a set-piece double as Atletico Madrid saw off Cadiz 4-2 to move 10 points clear at the LaLiga summit.

Real Madrid's shock 2-1 loss to Levante on Saturday provided Atleti with a chance to extend their lead at the top and they did exactly that with victory at Estadio Ramon de Carranza.

Diego Simeone's men had trailed in their last two outings, though Suarez opened the scoring with a sublime free-kick in Sunday's clash before Alvaro Negredo equalised.

Saul Niguez's flicked finish and Suarez's penalty gave Atleti some breathing space and, while Negredo's second of the day did make things interesting, Koke finished smartly late on to make certain of an eighth league win in a row.

Anthony Lozano glanced wide from a promising Cadiz opportunity and, less than three minutes later, Suarez sent a 28-yard free-kick up and over the wall and into the left corner to give Atleti the lead.

Cadiz were level almost instantly thanks to Negredo, who curled a fine finish beyond Jan Oblak after the ball had ricocheted into his path off Thomas Lemar.

The visitors had won only one of their last eight league games prior to Sunday and it did not take Saul long to restore Atleti's lead with a rather fortunate goal.

Lemar sent in a cross from the right and Saul stuck out a leg, seemingly in an attempt to help the ball on, but instead succeeding in sending it looping over Jeremias Ledesma.

Atleti survived another scare before half-time when a penalty initially awarded for handball against Koke was overturned by VAR due to the midfielder's arm being on the ground when contact was made.

That proved a big moment as Simeone's side converted a penalty of their own through Suarez five minutes into the second half after Marcos Mauro brought down Lemar.

Suarez blazed over when on for a hat-trick and that nearly proved costly as Atletico failed to deal with a ball into the box and Negredo scrambled past Oblak to give Cadiz hope.

Oblak then had to be alert to keep out Negredo's header, but the next goal went Atletico's way, substitute Angel Correa exchanging passes with Marcos Llorente and squaring for Koke to round off the scoring.

Arsenal defender William Saliba admits he was "hurt" after not being given first-team opportunities following his move from Saint-Etienne. 

The 19-year-old arrived at the Emirates Stadium in July 2019 for a reported £27million (€29.7m) fee and was loaned back to Saint-Etienne for the 2019-20 campaign.

He returned to the Gunners ahead of this season and was expected to become part of manager Mikel Arteta's plans after a possible second loan back to Saint-Etienne failed to materialise in October.

However, the France youth international did not make a senior appearance for the Premier League club and was loaned to Nice earlier this month.

Saliba made his fifth appearance for the Ligue 1 outfit in Sunday's 1-0 defeat to his former club Saint-Etienne. 

Despite the result he had an impact at the heart of the backline, making more successful passes (58) and clearances (five) than any other Nice player.

He also gained possession seven times, the joint second-highest of any player on the pitch.

Saliba has opened up on his frustration with life at Arsenal and feels strongly he should have been given a chance to impress in the first team.

"I really, really, really didn't think that I would be transferred for almost €30m," he told TF1.

"To think that I would arrive, where people were expecting a lot from me, the fans were excited about me and you find yourself in the reserves, playing zero – nothing in the Europa League or the Premier League.

"I was in the squad once in the EFL Cup. It hurt me, it affected me. I don't think I left too early. When you feel ready you have to go. These things happen. I believe in myself."

While Saliba is enjoying playing first-team football again at Nice, he insists he is not thinking about where he will be next season.

"I have learned now that it is better not to look too far in the future," he added. "I am focused on just these six months to try to give absolutely everything and for the rest we will see.

"For me, the best decision was to join Nice because there is a good project, a good team, a good level of ambition and they like to play in a certain way.

"It feels good to play and to have consistent game time. I am young, I am 19, and it is by playing matches like this that you improve.

"You see what mistakes you make and you correct them for the next match."

Neymar converted a penalty in each half but Paris Saint-Germain collapsed to a sensational 3-2 defeat at relegation-threatened Lorient in Ligue 1

Mauricio Pochettino's first loss as head coach means PSG missed out on the chance to return to the top of Ligue 1 in place of Lyon after sub Terem Moffi broke clear to net a stoppage-time winner.

Lorient were the better team before half-time and led through Laurent Abergel's first goal in almost a year

However, a tale of woe then unfolded for Houboulang Mendes, who conceded 45th and 58th-minute penalties, from which Neymar made no mistake.

Yoane Wissa replaced the embattled right wing-back soon afterwards and levelled with a fine solo effort before fellow sub Moffi snatched glory.

Lionel Messi's contract details becoming public knowledge was not the fault of Barcelona, the LaLiga club have claimed.

A report by El Mundo claimed the deal Messi signed at Camp Nou in 2017, which expires at the end of this season, is worth more than €555million over the course of four years.

That would mean the six-time Ballon d'Or winner is in possession of the most lucrative contract in sports history - something that jars against Barcelona's worsening financial plight.

Accounts for the 2019-20 season showed the club's gross debt had reached €820m as the coronavirus pandemic began to take a considerable toll on their finances.

A fractious presidential election is set to conclude in March, with a strained relationship between Messi and the former board, headed by ex-president Josep Maria Bartomeu, having played a part in the superstar forward sensationally trying to force a transfer away from Barcelona last August.

In that context, Barca moved quickly on Sunday to offer assurances to their captain and pledged to take legal action against El Mundo.

"In view of the information published today in the newspaper El Mundo, in relation to the professional contract signed between FC Barcelona and the player Lionel Messi, the club regrets its publication given that it is a private document governed by the principle of confidentiality between the parties," a statement read.

"FC Barcelona categorically denies any responsibility for the publication of this document and will take appropriate legal action against the newspaper El Mundo, for any damage that may be caused as a result of this publication.

"FC Barcelona expresses its absolute support for Lionel Messi, especially in the face of any attempt to discredit his image, and to damage his relationship with the entity where he has worked to become the best player in the world and in football history."

Barcelona return to action on Sunday at home to Athletic Bilbao in LaLiga, where they remain 10 points behind leaders Atletico Madrid despite a run of four consecutive top-flight wins.

Messi, who was red carded for the first time in his Barca career against Athletic earlier this month, has contributed 15 goals and four assists in all competitions in 2020-21.

Klay Thompson described his pain at missing another season due to injury as he saw the Golden State Warriors beat the Detroit Pistons at Chase Center.

Three-time champion Thompson, who has spent his entire career with Golden State, tore his anterior cruciate ligament in the 2019 NBA Finals.

The five-time All-Star subsequently sat out the 2019-20 campaign as the Warriors struggled badly, but the team were set for another run this year.

However, their hopes were hampered by another major setback for Thompson, who suffered an Achilles injury ahead of the season that will keep him out for a further year.

The Warriors have stayed competitive so far in 2020-21, carried by superstar Steph Curry, who has averaged 27.7 points and leads the league in total points with 554.

Golden State moved to 11-9 – good enough for eighth in the West – with their 118-91 defeat of Detroit but are still missing Thompson.

The 30-year-old averaged 21.5 points per game between the start of the 2014-15 season and his first big injury in 2019. The Warriors' next best scorer after Curry this year is Andrew Wiggins on 17.9.

Speaking publicly for the first time since his Achilles blow as part of the NBC Bay Area broadcast team on Saturday, Thompson said: "I'm living good.

"[It is nice] to be back in the building that I'm so eagerly awaiting to play in. I'm just a little bored at times.

"Stuff's slow with trying to let my Achilles heal and get to the next stage, which is mobility work, but I'm feeling good. I'm happy to be with my team-mates, obviously.

"Unfortunately, I'm not playing. It kills me every day, but I plan on playing for a long time, and I don't want to have any mishaps come this rehab."

Thompson watched Curry contribute 28 points against the Pistons, comfortably securing victory to end the week on a high.

Golden State had back-to-back wins against the Minnesota Timberwolves but then lost heavily to the Phoenix Suns prior to the Detroit game.

Coach Steve Kerr said: "I thought we were on edge in a good way. The other night we were embarrassed. We got away from who we are."

Melbourne City missed out on the chance to pull level with the early A-League leaders as they crashed to a 3-1 home defeat against Perth Glory.

Daniel Stynes gave the Glory an early lead courtesy of a deflected effort, although Jamie Maclaren levelled in the 33rd minute when Craig Noone's shot came back off the post.

Dane Ingham headed Perth back in front before the break and another set-piece goal six minutes from time by Nicholas D'Agostino - both of which were assisted by former City midfielder Neil Kilkenny - sealed the points.

Richard Garcia's side are level with Melbourne City on six points after bouncing back from two consecutive defeats.

Wellington Phoenix claimed their first win of the campaign at the fourth attempt thanks to Jaushua Sotirio sealing a late 2-1 triumph at Central Coast Mariners.

Ulises Davila drilled home a crisp left-footed strike after 15 minutes at a soggy Central Coast Stadium, but Alou Kuol nodded in Daniel De Silva's left-wing corner to ensure it was all square at half-time.

The Mariners looked to be on course for the point that would have edged them above Brisbane Roar at the top of the standings, albeit having played a game more.

Sotirio showed he had other ideas when he caught the home defence napping on the end of Alex Rufer's chipped pass and produced a cool finish.

LeBron James compared his achievements with the Los Angeles Lakers to Tom Brady's early success at the Tampa Bay Buccaneers as the legendary quarterback prepares for his latest Super Bowl appearance.

James, a four-time champion and four-time MVP in the NBA, led the Lakers to the title last year in just his second season in LA.

Meanwhile, Brady is in his first year in Tampa Bay, having ended a glittering career with the New England Patriots, and has taken the Bucs to next week's big game against the Kansas City Chiefs.

James turned 36 last month but is still averaging an impressive 25.2 points per game in 2020-21, a mark he has not dipped below since his rookie season in 2003-04.

Meanwhile, Brady – a three-time NFL MVP chasing a seventh championship – is now 43 yet ended the regular season with 40 touchdowns, the second best return of his career, and a passer rating of 102.2.

Neither man shows signs of slowing and James was asked on Saturday what he made of the continued excellence of a fellow sporting great.

"It doesn't do anything for me as far as what I do in my profession, but it does let me know – lets both of us know – that we can still play this game at a high level," James said after the Lakers' 96-95 win at the Boston Celtics.

"No matter how many miles, how many games, no matter how many dollars, no matter the statistics – in our respective professions, at our age, we can still dominate our sport.

"Also we can bring together groups that we may have not been around for long periods of time.

"It's our professionalism, how we attack the sport, how we attack every single day of being a professional, wanting to win every single day – in practice, on the film, in games, and so on and so on.

"We gravitate towards people and people gravitate towards us because we have one common goal and that's to win and to win at the highest level."

James had 21 points, seven rebounds and seven assists against the Celtics, ending the Lakers' first two-game losing streak of the season with his 854th career win – outright eighth on the all-time list.

"We didn't want to lose one and we lost two in a row, Philly and Detroit," he said, with the Lakers at Atlanta next in the final game of a seven-game road trip.

"We understood we were coming into a hostile environment and we know how good this team is.

"We'd have to play good basketball in order to win and we were able to win one possession more than they did."

Those fine margins came as Kemba Walker missed a game-winning chance for the Celtics in the final seconds, capping a dismal night on which he shot 1-of-12 from the field and 0-of-5 from three.

Walker scored only four points in just over 28 minutes; it was the seventh time in his career he had scored no more than four points in at least 28 minutes in the regular season.

"I thought I had a good look [on the final shot] but I struggled all game shooting the basketball," Walker said.

He added: "It's more mental, I think. I'm trying my hardest not to get frustrated but I thought tonight I got frustrated at myself and it put me in a bad place.

"I'm not the type of player to get frustrated – I'm always smiling and I wasn't that tonight. I got into my own head and, mentally, I hurt myself.

"I can't do that to this team. These guys look to me, especially when things are going tough. I can't put my head down and not mentally be engaged in the game like I was tonight."

Damian Lillard conceded his ambitious streak took over when he sunk a sensational buzzer-beater to snatch victory for the Portland Trail Blazers over the Chicago Bulls.

The Bulls were leading 122-117 when Lillard hit a 37-foot three pointer with 8.9 seconds left before Gary Trent Jr won a jump ball that ended up in the star point guard's hands.

From there, Lillard drilled a superb step-back three, his eighth successful attempt from range to conclude a 44-point haul – the 35th 40-point game of his career.

"I knew they were going to try and deny me and be real physical so I just popped back towards half court," Lillard said.

"I just wanted to get a clean look. If I missed it, that probably would have been game, but it had been feeling good coming off my hands all night and I made that one.

"In these situations I usually look up at the clock and I get real ambitious - how can I help our team get out of this situation?

"A lot of times it doesn't work out but today it worked out."

Trent certainly feels Lillard is playing down his vaunted capacity to make clutch shots.

"This is what he does. Nobody is surprised in a sense," he said.

"He makes big-time shits. He's done this time after time after time.

"So at this point… it's just I know it was going in when he shot it."

Speaking to reporters afterwards, Blazers coach Terry Stotts insisted there was little credit he could share with man-of-the-moment Lillard.

"It's innate. It's God-given," he said. "He's born with it, and you can't teach it."

Rafael Nadal wants to play at the Olympics but the star said fitting more quarantining into the ATP Tour calendar looked "difficult".

After being postponed last year due to the coronavirus pandemic, the Games are scheduled to start in Tokyo on July 23.

Naomi Osaka said she would be willing to quarantine ahead of the Olympics, with players having gone through similar in preparation for the Australian Open.

Nadal, an Olympic gold medallist in singles and doubles in 2008 and 2016 respectively, said he would listen to the experts, but acknowledged quarantining could be tough.

"It's the same as always. I am nobody to have a clear opinion on that.  I am just a tennis player, a human person that doesn't have enough knowledge about all the situation," the Spanish star told a news conference on Sunday.

"What we have to do is just follow the instructions of what the people who really have the right knowledge of all this stuff give to us. What's going to happen in Tokyo for the Olympics, if the Olympics are going to happen or not, or if we have to do quarantine before Olympics for 15 days or not, seems like a sports perspective very difficult because it's difficult for us, I don't know, combining our Tour with another 15 days of quarantine to play Olympics. It looks difficult to fix it in our calendar.

"But, as I said, we're going to do what the people who know about virus and who know about protecting the people in every single country, [we] are going to just follow their instructions."

Asked if his intention was to go, Nadal said: "I think everybody wants to play in Olympic Games, then let's see what's going on."

Nadal and Spain will begin their ATP Cup campaign against Australia on Tuesday.

Naomi Osaka would be prepared to spend another two weeks in quarantine to be able to play at a "very special" Olympics in Tokyo.

Postponed due to the coronavirus pandemic, the Games are scheduled to begin on July 23 this year.

This year's Australian Open will begin on February 8 after players quarantined ahead of the first grand slam of the year.

Osaka said she would be prepared to do it all again if it meant she got the chance to play at the Olympics.

"Honestly, my concern isn't the athletes. The way that I feel is I will stay in my room for two weeks to play the Olympics. I missed out on the last one," the Japanese star told a news conference on Sunday.

"Playing in Tokyo would be very special to me. My concern would be the general safety of everyone else because you're opening the country.  Everyone is flying in from different places. I would just want the public to feel safe.

"I feel like the athletes definitely would want to play, but I would want the public to feel safe."

Doubts have also been cast over the Olympics going ahead this year due to COVID-19.

Osaka, a three-time major champion, said while people she had spoken to were excited, some were worried.

"For me the people that I've spoken to, they're really excited about it, but they're concerned because, I don't know, there's just like so many different people entering. I don't know," she said.

"For the people I've talked to, they said as long as everyone is safe, as long as Japan is getting better and not worse, then it should be okay.

"But for me, hmm, don't quote me on that."

Ahead of the Australian Open, Osaka is playing the Gippsland Trophy, where she will face either Alize Cornet or Ajla Tomljanovic in the second round.