Xavi described his return to Barcelona as "the biggest challenge of my career" after he was officially confirmed as the club's next head coach.

Barca announced in the early hours of Saturday that former Spain star Xavi had been appointed as Ronald Koeman's replacement at Camp Nou.

Club delegates travelled to Qatar this week to formalise the payment of the release clause in the 41-year-old's contract with Al Sadd, where he has been head coach for the past two and a half years.

Xavi's first senior coaching role in Europe will see him entrusted with steering Barca through one of the most difficult periods in their modern history.

Debts of more than €1.2billion meant the Blaugrana could not afford to sign Lionel Messi to a new contract or make any significant investment in the playing squad before this season, and results on the pitch have been concerning: they are ninth in LaLiga, having won only four of their first 11 games.

Xavi made 767 appearances for Barca in all competitions, a tally only surpassed by Messi (778), before retiring as a club hero in 2015 after winning his eighth league title and fourth Champions League.

However, he believes returning to the club at this time represents by far the toughest test he has faced as a professional.

Speaking to reporters before flying back to Spain, he said: "It's the biggest challenge of my career. I'm really happy, I'm coming home, coming back to Barca. It's a major challenge.

"I'm really grateful to Barca. They came to Doha, my contract was rescinded, there was a clause, and each of us has done our part. I'm really grateful to the club."

Xavi hopes his familiarity with some of Barca's more experienced players could serve as an advantage as he attempts to hit the ground running.

"The first thing to do is to speak with the players, to explain to them the ideas I have and to work a lot," he said.

"To coach friends is an advantage, it's a positive point. I know how they train and I know what they're like. I see it as an advantage."

Derrick Rose said he is "playing with joy" after helping to spark a superb New York Knicks revival in their 113-98 defeat of defending NBA champions the Milwaukee Bucks on Friday.

The Knicks were slow out of the blocks at Fiserv Forum and trailed 38-19 by the end of the first quarter in Milwaukee.

But New York came roaring back, with Julius Randle scoring 32 points and finishing with 12 rebounds, while RJ Barrett had 20 points.

Rose was also influential off the bench, putting up 23 points including 10 in a second quarter in which the Knicks outscored the Bucks 37-25, while he drained a crucial three-pointer in the third shortly after a Barrett lay-up had put the visitors in front.

"I'm playing with joy. It ain't happiness, it's joy," Rose said. "I feel happiness is temporary. Joy is everlasting.

"I've been through a lot. I'm in a great place and I'm on a very talented team. I don't have to score, I don't have to score 30 points. 

"I don't have that burden. I can go out there and play the game and try to affect the game by passing or just pushing the ball. So, I'm in a great place."

After being drafted first by hometown team the Chicago Bulls in 2008, Rose became the youngest MVP in 2011 at the age of 22.

However, a series of serious knee injuries hampered his progress and he left Chicago for an unsuccessful first stint with the Knicks in 2016 before also representing the Cleveland Cavaliers, Minnesota Timberwolves and Detroit Pistons.

Rose returned to New York in February and was a key reason for their run to fourth in the Eastern Conference last season. Now 33, he contested suggestions his performance against Milwaukee was "vintage".

"What's vintage about it? I wasn't shooting threes, not pulling off shots like I am now, if you want to say it, it's whatever," he said.

Randle had 16 points and eight rebounds in the first half and he hailed the character in the team to complete such a resounding comeback.

"It showed a lot about the character of our team," he said. "NBA games are long. What's special about our team is we fight. We have a lot of high character guys."

Head coach Tom Thibodeau hopes his side do not find themselves in such precarious positions too often, though credited the team for their resilient fightback.

"Obviously, you don't want to get down like we did, but we did," he said. "It's a long game. You've got to keep fighting and get it to a manageable number. 

"Once we got going a little bit and we made a couple hustle plays, it galvanised us and gave us energy."

It's felt inevitable that Xavi would return to Barcelona at some stage and the time has finally come.

The former midfielder has agreed to take over from Ronald Koeman, embracing both a financial and sporting crisis at Camp Nou that sees the team ninth in LaLiga and more than €1.2billion in debt.

Given his pedigree as a player for the club, where he won 25 major trophies, and the fact he has delivered three cups and a Qatar Stars League title in his time in charge of Al Sadd, you would be forgiven for thinking Xavi could have chosen to bide his time and wait for a more opportune moment to take the job.

Yet here we are, with another of Europe's grandest sides appointing a club legend. It's a move that often resonates well with a disillusioned fan base, but recent history tells us a star playing career often counts for little when it comes to life in the dugout at the elite end of football.

There are a fair few examples of ex-players heading back to their old clubs in the past few years – and to different levels of success...

Mikel Arteta (Arsenal): Jury's out

When Arsenal lost their first three league games of the season without scoring a goal, it looked like the Arteta experiment might have run its course.

Now on a nine-game unbeaten run in all competitions, buoyed by a derby defeat of Tottenham and a manager of the month award for September, it's beginning to look as though the former captain might just have got things on track at Emirates Stadium.

Winning the FA Cup last year was also a big feather in Arteta's cap, but there's still a sense that the next bad result is just around the corner. After all, he lost 20 of his first 60 league games in charge; it took Arsene Wenger 116 matches to reach that number.

Ronald Koeman (Barcelona): Failure

There is no question Koeman stepped into the breach at Barca at a terrible time, with an institutional crisis ongoing and the team having lost 8-2 to Bayern Munich in Quique Setien's final game in charge. He was chosen for his estimable record as a player at the club, and he did at least deliver Copa del Rey success last term.

Yet as soon as new president Joan Laporta admitted before this season that he was basically only keeping Koeman because there wasn't another option, the writing was on the wall.

Uninspiring football and a troubling run of results that culminated in a first loss to Rayo Vallecano since 2002 forced Laporta into action – he sacked Koeman on the flight home, if reports are to be believed. In the end, his contribution as a player offered little protection.

Niko Kovac (Bayern Munich): Short-term success

Kovac took over from Jupp Heynckes before the start of the 2018-19 season, becoming only the fourth former Bayern Munich player to become head coach (after Soren Lerby, Franz Beckenbauer and Jurgen Klinsmann).

Trophies were not a problem: Kovac won the DFL-Supercup 5-0 against old club Eintracht Frankfurt in his first match in charge, and the Bundesliga title and DFB-Pokal followed. Nobody at Bayern had ever won the double as both player and coach before.

It all turned a bit sour in 2019-20, though. Bayern won just five of their opening 10 league games and were thrashed 5-1 by Frankfurt in November, at which point Kovac and the club agreed the time was right to part ways.

Frank Lampard (Chelsea): Failure

Chelsea's record goalscorer only had one season of experience at Championship side Derby County before being entrusted with the big job at Stamford Bridge.

Losing 4-0 to Manchester United in his first game wasn't exactly a strong start, but Lampard did guide the Blues to fourth in the Premier League and an FA Cup final, all while navigating the difficulties of a transfer ban.

However, after a squad investment of close to £250million before 2020-21, Chelsea's progress stalled and a run of two wins in eight league games saw Lampard replaced by Thomas Tuchel. His points-per-game average of 1.67 was the fourth lowest of any permanent Chelsea manager in the Premier League era.

Andrea Pirlo (Juventus): Failure

Compared with Pirlo, Lampard was a seasoned veteran in managerial terms. Juventus handed the top job to their former star midfielder when his only coaching experience was nine days of looking after the Under-23 side.

Pirlo's swaggering style as a player did not translate itself to the dugout: Juve lacked cohesion and creativity and were embarrassed when 10-man Porto knocked them out of the last 16 of the Champions League, a result that did more damage to Pirlo's position than any other.

The former Italy man delivered Supercoppa Italiana and Coppa Italia success, and managed to drag Juve back to a fourth-placed finish on the final day of the season, but Inter had already marched to the title by then. In the end, Pirlo lasted less than a year.

Mauricio Pochettino (Paris Saint-Germain): Slow progress

Pochettino is a little different to the others on our list given his coaching experience covered Espanyol, Southampton and a memorable five years at Tottenham before he went to PSG, the club where he spent two seasons as a player.

The 49-year-old has won renown for getting his teams to play high-tempo, exciting football, but this has yet to be consistently evident in Ligue 1 even if results are mostly going his way.

Ten wins from 12 games have them comfortably top of Ligue 1, while wins over Manchester City and RB Leipzig stand them in good stead in the Champions League, but it feels like PSG are too often being rescued from mediocre performances by a moment of inspiration from a star player – and that's rarely been the Pochettino way.

Ole Gunnar Solskjaer (Manchester United): Who knows?

Manchester United have become one of the most singularly baffling football teams in the world under Solskjaer, the man who won six Premier League titles as a player and scored arguably their most famous goal: the winner in the 1999 Champions League final that secured the treble.

Hired as an interim coach in December 2018 to repair the damage of Jose Mourinho's final months, Solskjaer rebuilt United's morale through sheer goodwill and a heady dose of nostalgia, both of which have kept him in the job ever since.

They finished second in the Premier League last term but lost the Europa League final, and seem to have gone backwards in 2021-22, with that 5-0 hammering by Liverpool almost sounding the death knell for Solskjaer. However, the talents at his disposal – not least Cristiano Ronaldo – seem to do just enough to keep Ole at the wheel on a weekly basis.

Zinedine Zidane (Real Madrid): Resounding success... but walked away (twice)

Many of these clubs hoped to discover the next Pep Guardiola: the famous ex-player who could turn his first senior coaching job into something not just successful, but era-defining, unforgettable. Zidane at Real Madrid is the closest we have seen.

After spells as assistant to Carlo Ancelotti and coach of the Castilla, Zidane replaced the unpopular Rafael Benitez in January 2016 and led them to Champions League glory. He did the same for the next two seasons as Madrid became the first side in the tournament's modern era to win successive trophies.

Zidane also won two LaLiga titles: in 2016-17, in which he oversaw a club-record 40 games unbeaten in all competitions, and in 2019-20, when he had returned to club after walking away in May 2018. He left again at the end of 2020-21, the only season in which he did not win a trophy.

For Real Betis, the past 15 years haven't been the easiest. They've been relegated from LaLiga twice and failed to secure a first return to the Champions League since 2004-05, while just a few kilometres north, their bitter rivals Sevilla have enjoyed the greatest period in their existence.

Sevilla have won six UEFA Cup/Europa League titles, a couple of Copa del Rey crowns, the European Super Cup and qualified for the Champions League eight times.

Back in January 2018, the winds of change appeared to sweep through Seville. Betis were 5-3 winners at the Ramon Sanchez Pizjuan in an astonishing, historic match.

Sevilla hadn't lost any of their previous 29 home matches, a run that stretched back to 2016, and were unbeaten in eight editions of Spain's fiercest derby. But on the day, Quique Setien's men were as irresistible going forward as the hosts were hopeless at the back.

Betis went on to finish sixth in the table, one place above a Sevilla side that went through three coaches over the course of the season. It was their first campaign without famed sporting director Monchi and without him they struggled massively for direction.

This was arguably the most vulnerable their status among Spain's top clubs had been since returning to LaLiga in 2001-02, yet they largely managed to weather the storm and Monchi's return restored much-needed stability. Betis, on the other hand, finished 10th and 15th in the following two campaigns, the promising early work of Setien proving something of a false dawn.

But once again there is an aura about Betis, and success in Sunday's Gran Derbi would really show they mean business.

Fun but flawed

Manuel Pellegrini's reputation in some quarters may have taken a bit of a bashing after a fairly underwhelming spell at West Ham, but it was going to take something drastic for him to be written off in Spain given the miracles he worked at Villarreal earlier this century.

It's fair to say things have gone well at the Benito Villamarin for the Chilean, with their sixth-placed finish in 2020-21 ensuring a return to the Europa League and they've started 2021-22 in fine fashion as well.

In fact, their record in 2021 is especially startling. They have lost just six of 42 matches across all competitions this year – across the top five European leagues, only Inter have been defeated less often.

While this Betis may not provide quite the same thrill ride as Setien's from a few years back, they're certainly among LaLiga's greatest entertainers this season.

The personnel available to Pellegrini gives Betis the technical capability to knock the ball around well but they're arguably at their most comfortable when getting the ball forward quickly, with their 26 direct attacks second only to Real Madrid (28) this season.

This coupled with the high quality of the individuals they possess in attack makes them one of the more threatening teams going forward, with their 13.0 expected goals (xG) from open play only bettered by Madrid (15.5), Barcelona (14.7) and – fractionally – Sevilla (13.1).

They are also efficient pressers. While their 79 high turnovers may only be the seventh highest in LaLiga this term, their 24 shots from such situations is at least four more than anyone else – these haven't led to any goals yet, but it's a positive sign that they appear pick their moments to increase the pressure well.

But conversely, one of the other reasons that Betis matches are so entertaining to watch is that they're not particularly solid at the back, as Thursday's 4-0 Europa League hammering by Bayer Leverkusen showed.

Now, this can potentially be explained by their attack-first mentality, but it should be a cause for concern in the long run if they cannot fix it, especially if they do harbour hopes of finishing in the top four.

Their 11.8 expected goals against (xGA) in open play is the third-worst in LaLiga and almost double Sevilla's respective record (6.2), and that probably doesn't bode well for a derby that can be open and frantic.

The Leverkusen loss came just a few days after Betis were also particularly poor defensively against Atletico Madrid, a 3-0 defeat in which they barely laid a glove on the defending champions.

And perhaps therein lies the biggest psychological barrier of all ahead of Sevilla's visit. Under Pellegrini, Betis have won none and lost seven of their 10 matches against their neighbours, Madrid, Atletico and Barca.

A win on Sunday will move them level on 24 points with Sevilla, who head into the weekend only a point off the top, but arguably more important than anything is that defeating Julen Lopetegui's men might finally show they can rise to the challenge of the league's best teams.

Beauty and the beast

When on song, there are few players in LaLiga more thrilling to watch than Nabil Fekir. Betis fans probably pinch themselves that he's still at the Benito Villamarin – to be honest, the very fact they managed to sign him in the first place was pretty remarkable.

Ignoring the petulance that saw him sent off in Leverkusen, Fekir's made a very lively start to 2021-22, which made it even more astonishing that Pellegrini opted to rest him against Atletico. Now, he was only one booking away from a suspension that would've ruled him out of the derby, but still.

Of course, his talents are nothing new to many, but he's proving what an asset he is with his form at the moment.

His 33 chances created is the second-most in LaLiga after Iker Muniain's (39), with the Frenchman both effective in open play and set-pieces, with these opportunities amounting to 2.7 expected assists, second only to Memphis Depay (4.5).

In open play is when Fekir's at his most useful for Betis, though, with his exceptional close control and dribbling skills able to open up spaces and situations that others can't. He's completed 29 dribbles this term – Javi Galan (30), Yannick Carrasco (31) and Vinicius Junior (33) are the three with more.

He's also attempted the third-most shots (34) in the league, though his one-goal haul (2.1 xG) suggests he might be better off showing a little more restraint.

But while Betis are undoubtedly a side that's easy on the eye with the likes of Fekir and Sergio Canales on the pitch, they've also got someone adept at doing the dirty work.

Guido Rodriguez has enjoyed a rapid rise to prominence since moving from Club America in January last year, with the Argentina international's trademark bite and tenacity quickly becoming a key element for Betis.

A tall and strong defensive midfielder, Rodriguez has great presence without the ball. Even if he doesn't necessarily win the ball back himself, his willingness to get stuck in gives Betis real steel in the middle and makes him a formidable opponent.

He may not possess the passing ability of William Carvalho, but he's a considerably greater defensive presence, with Rodriguez averaging 3.1 tackle attempts per 90 minutes since the start of last season – among players to play at least 1,000 minutes in that time, only two players have been more forceful than him.

He also ranks in the top 10 among the same players for possession won (7.7) each match. There really is more to Betis than just the craftiness of Fekir.

Sevilla lacking soul

Betis' midfield could be the key on Sunday. While it's in this area of the pitch with players like Rodriguez and Fekir that they thrive, midfield is probably Sevilla's weakest area.

While Fernando was excellent for much of last season and Joan Jordan was solid enough as a No.8 a little in front, Lopetegui muddled through the campaign without ever really figuring out what to do with that third – the most advanced – midfield position.

Ivan Rakitic was usually the one to play there, but Oscar Rodriguez, Papu Gomez and Oliver Torres were also all used there to minimal success. But while that didn't really look like much of a problem last season, there's been little to suggest Lopetegui's fixed the issue, and it's been exacerbated by Jordan going through a drip – the Spaniard has seemed less influential, with his touches dropping from 88.1 each game to 74.4.

Lopetegui has come under fire from some supporters this season for the football they've played, which has looked especially monotonous in the Champions League, but let's not forget they could feasibly go into the international break top of the table, and they do have their strengths.

They may not engage in exhilarating high pressing, with their 46 high turnovers comfortably (by 10) the lowest in the division, but with the likes of Jules Kounde and Diego Carlos, Sevilla are pretty adept at evade their opponent's attempts to press, as evidenced by the fact their 66 high turnovers against is the fourth-lowest.

Similarly, while their forward line may not trigger a high press, once their opponents get into midfield, they are extremely persistent. There have only been four instances of teams managing to string together 10 or more passes that lead to either a shot or touch in the box against Sevilla, the best such record in the division.

But in possession, this is a Sevilla side that lacks identity. While they like to dominate the ball, with their 6,011 passes this season third to Barcelona (6,899) and Madrid (6,173), they're hardly masters of 'tiki-taka'.

Their 40 sequences of 10 or more passes is the third-highest in LaLiga, but they've yet to score a goal in that manner. When they go direct, they're far more efficient, with 13 – which is below average in itself – direct attacks yielding three goals.

It could be argued that the playmaker they're missing is all that's preventing Lopetegui turning Sevilla into a truly excellent team.

Betis will hope something doesn't suddenly click this weekend as they look to overcome a significant mental barrier.

The Los Angeles Clippers trailed by 20 at one point in Friday's game at the Minnesota Timberwolves and their best player missed 80 per cent of the shots he attempted, yet they still managed to run away with their third straight victory. 

Confidence is growing for a team that started the season in a 1-4 slump, and Friday's stunning 104-84 defeat of the Timberwolves was the latest building block. 

The Clippers outscored Minnesota 57-27 after half-time, the fewest points by any team in a half so far this season, as they became the fourth team in the last 25 years to trail by 20 before winning by 20. 

"To be down 20 on the road and come back and win by 20, just shows a lot about our team – about our character, our resilience, not giving up," Clippers head coach Tyronn Lue told reporters. "We could’ve easily gave in by winning Wednesday’s game and kind of giving into this game, but our guys kept fighting and kept competing, and that’s what you love to see."

On the heels of a 126-115 win in Minnesota on Wednesday, the Clippers got by on a poor shooting night by making sure the Timberwolves shot even worse. 

Los Angeles limited the home team to 34.8 per cent shooting from the field, including a stunning 17 of 52 (32.7 per cent) showing from three-point range, while out-rebounding Minnesota 62-42 and forcing 21 turnovers. 

In a normal game, stats like that would have produced a far more lopsided win, but the Clippers needed every bit of that defending Friday. 

Paul George made just four of 20 from the field and the Clippers knocked down only six of 28 shots from three-point range (21.4 per cent). 

George and his team-mates ended up doing most of their damage from the free-throw line, where they had 32 attempts to Minnesota's seven. George made 13 of 14 from the line to account for the bulk of his 21 points. 

"My guys, they get all the credit tonight," George said. "They kept us alive, they kept me going, it was a group effort."

Reggie Jackson added 20 points and Ivica Zubac contributed 14 points and 14 rebounds for Los Angeles.

"I thought Big Zu was a force down low in the paint tonight," Lue said. "I thought Zu was phenomenal."

The Clippers (4-4) return home to face the Charlotte Hornets on Sunday. 

Undeterred by a dreadful first quarter, the New York Knicks stormed back for a 113-98 road win against the Milwaukee Bucks on Friday. 

Trailing the defending NBA champions 38-19 after the opening period, the Knicks found their rhythm behind Julius Randle's game-high 32 points. 

Derrick Rose came off the bench to score 23 and RJ Barrett added 22 for the Knicks as they improved to 6-3 overall and 4-1 on the road.

"Obviously, you don't want to get down like we did, but we did," Knicks head coach Tom Thibodeau told reporters. "It's a long game. You've got to keep fighting and get it to a manageable number. Once we got going a little bit and we made a couple hustle plays, it galvanized us and gave us energy."

Giannis Antetokounmpo had 25 points and Grayson Allen 22 for the Bucks, but Milwaukee's other three starters combined for just 15 points as the champs shot 40.2 per cent from the field and were out-rebounded 59-37. 

The Bucks (4-5) have lost four of their last five games and are 1-4 at home. 

Clippers fight back to down Timberwolves

The Los Angeles Clippers mounted an impressive comeback of their own, trailing the Minnesota Timberwolves by 21 at one point before rallying for a 104-84 victory. Paul George had 21 points, 11 rebounds and four assists to lead the Clippers (4-4), while Karl-Anthony Towns had 20 points and eight rebounds for Minnesota (3-5).

Kevin Durant's 29 points and 10 rebounds lifted the Brooklyn Nets (6-3) to a 96-90 road win against the Detroit Pistons (1-8). First overall draft pick Cade Cunningham's shooting woes continued as he went six-for-17 from the field but the rookie led the Pistons with 17. 

Stephen Curry made just five of 15 shots from the field, all but two of those attempts coming from three-point range, but the Golden State Warriors (7-1) still rolled to a 126-85 victory over the New Orleans Pelicans (1-9) thanks to 26 points from Jordan Poole. 

Morant misfires in loss to Wizards

Ja Morant has been one of the NBA's most effective scorers so far this season but the Washington Wizards (6-3) shut down the Memphis star in a 115-87 rout of the Grizzlies (5-4). Morant entered the game averaging 27.0 points and shooting 52.2 per cent from the field but made just four of 17 shots Friday on the way to an 11-point night. 

Formula One has re-affirmed its commitment to China, announcing Saturday that its deal with the Chinese Grand Prix has been extended through 2025. 

The Shanghai race has not been contested since 2019 due to the coronavirus pandemic. 

The stop was omitted from the 23-race F1 calendar for the 2022 season that was announced last month, with the series saying it would return as soon as possible. 

F1 president and CEO Stefano Domenicali echoed those sentiments in Saturday's announcement of an extended deal. 

"While we are all disappointed we could not include China on the 2022 calendar due to ongoing pandemic conditions, China will be restored to the calendar as soon as conditions allow and we look forward to being back with the fans as soon as we can," Domenicali said in a release. 

Lewis Hamilton won the last race there and has been victorious in six of the 16 editions of the event, four more than any other driver. 

New York's newly elected mayor has no plans to change the city's coronavirus vaccination mandate, saying it is up to the NBA and Kyrie Irving to find a solution that will get the Brooklyn Nets star back on the court. 

The 29-year-old remains unvaccinated and is therefore ineligible to play home games at Barclays Center or games at the New York Knicks' Madison Square Garden.

Under current city restrictions, people in New York must have at least one coronavirus vaccine to enter indoor arenas, and mayor-elect Eric Adams told CNN on Friday the policy will remain in place when he takes office January 1.

"New York City is not going to change their rule," Adams said. "It is up to the NBA and Kyrie to come to a full understanding on how to keep him on the Nets and to continue to look at all of our athletes that are coming here. Again, I think the NBA and Kyrie [are] going to come to a conclusion on this."

Asked about Adams' remarks after the Nets' 96-90 road win against the Detroit Pistons on Friday, Brooklyn head coach Steve Nash said he was not surprised. 

"I didn't expect the mayor to change the mandate," Nash told reporters. "We've just got to focus on our team. If we could have Kyrie back, we'd all be ecstatic, but we focus on our team, we keep building, we keep growing and hopefully we'll be a really good team at the end of the year." 

After a sluggish start to the season, the Nets have won four in a row and sit at 6-3 following Friday's victory. 

Irving would be eligible to play in most road games but the Nets said three weeks ago that Irving would not be with the team in any capacity until he can be a full participant. 

The seven-time All-Star has played just 74 regular season games in two years since joining the Nets, missing long stretches due to injury issues and personal reasons.

Last year, on the same team as high-profile team-mates Kevin Durant and James Harden, Irving scored 26.9 points per game. That dropped to 22.7 points in the playoffs as he was again restricted.

Xavi has finally landed his dream job as head coach of Barcelona.

The 41-year-old was confirmed in the role early Saturday, and it will be his first coaching job in Europe after spending the past two and a half years in charge of Qatari side Al Sadd.

Xavi had two years to run on his Al Sadd deal, but Barcelona paid his release clause to allow the Camp Nou legend to replace Ronald Koeman.

He has signed a contract through the end of the 2023-24 season, with the new hire coming as a huge boost to the Catalan giants during a turbulent time for the club.

Barcelona said Xavi will be presented in an event Monday at Camp Nou. 

Al Sadd CEO Turk Al-Ali earlier said: "Xavi informed us a few days ago of his desire to go to Barcelona at this particular time, because of the critical stage his hometown club is going through, and we understand this and decided not to stand in his way."

Xavi racked up 767 appearances for Barca during his playing career – a tally only surpassed by Lionel Messi (778) – and won a glut of individual and team honours.

He won LaLiga eight times and the Champions League on four occasions before ending his 24-year association with the club in 2015.

After seeing out the final four seasons of his playing career with Al Sadd and adding four more trophies to his collection, Xavi made the transition into coaching in May 2019.

The 2010 World Cup winner has enjoyed success in the dugout, too, having guided his side to the top-flight title last season, on top of winning the Qatar Cup and Qatari Super Cup.

Former Spain international Xavi departs with Al Sadd three points clear at the top of the league following Wednesday's 3-3 draw with second-place Al-Duhail.

That proved to be Xavi's final game at the helm, and he now faces a huge job at Barcelona, who are down in ninth place in LaLiga with 11 games of their season played.

Barca lost to Real Madrid and Rayo Vallecano in Koeman's last two games before the Dutchman was sacked.

They have since drawn with Deportivo Alaves in the league and beaten Dynamo Kiev in the Champions League under interim boss Sergi Barjuan, who will lead the team Saturday at Celta Vigo. 

Serena Williams says the hamstring injury that forced her out of Wimbledon in the first round is "better" and she plans to play at the 2022 Australian Open. 

The site of her last grand slam crown in 2017 will be Williams' next chance to equal Margaret Court's record of 24 career slam titles. 

The 40-year-old tore her hamstring while playing Aliaksandra Sasnovich at SW19 in June and recounted the injury in an appearance Thursday on Jimmy Kimmel Live. 

"I was actually winning and I went for a shot and I heard this noise and I was like ‘oh no’," Williams said. "I felt it but I felt like 'OK, let me just keep trying', but it was bad and I was like, ‘oh man’.

"I love the grass, it’s something special walking out at Wimbledon, wearing all white and being on the green grass [but] it just wasn’t for me this year.”

The injury kept Williams out of the US Open, where she has not won since 2014 but reached the semi-finals in 2020 and the final in 2018 and 2019. 

While disappointed to miss her home slam, which she has won six times, Williams told Kimmel her recovery is on track and she "definitely" expects to play in Australia in January. 

"The hamstring is better," she said. "It took a long time. It took forever, but it's much better now." 

Williams is a seven-time champion in Melbourne, the most of any woman in the open era. 

Novak Djokovic says he has room to improve despite easing past Taylor Fritz in straight sets to reach the semi-finals of the Paris Masters.

The world number one is competing in his first tournament since his dream of winning a calendar Grand Slam was ended by Daniil Medvedev in September's US Open final.

After beating Marton Fucsovics in three sets and then benefiting from a walkover against Gael Monfils in the last 16, Djokovic made light work of Fritz in Friday's quarter-final.

He sent down eight aces and was successful with 72 per cent of his first serves that landed on his way to a 6-4 6-3 victory.

However, Djokovic lost his serve on three occasions and, while happy with his overall display, the Serbian feels like there is more to come from his game in the French capital.

"I was absent from the tour for two months coming into this tournament," he said. "The last competitive match I played was in the US Open final, compared to the other guys playing one or two events prior to Paris.

"I knew that I needed to start well, with good intensity and put in a lot of hours on the practice court. But it's different when you play points in a competitive match.

"I am pleased with the way I played against Fucsovics and again today, though I did have ups and downs. I am not entirely pleased with the way I closed out the sets.

"I backed myself up with good returns and read Taylor's serve very well to get into rallies. I closed out the last couple of service games well and that's a positive."

Djokovic is aiming to win the Paris Masters for a record-extending sixth time in his bid to end the year as world number one for a record seventh occasion.

The Serbian will contest his 71st career Masters 1000 semi-final – four short of Rafael Nadal's record – against Hubert Hurkacz, who saw off James Duckworth 6-2 6-7 (4-7) 7-5.

With that victory, the world number 10 clinched the final singles spot at the ATP Finals in Turin later this month.

Hurkacz is the second Polish player to qualify for the event after Wojtek Fibak in 1976. It also means only European players will feature in the ATP and WTA Finals for the first time ever.

Saturday's other semi-final in Paris will be contested between Djokovic's US Open conqueror Medvedev and Olympic gold medallist Alexander Zverev.

Home favourite Hugo Gaston eliminated Pablo Carreno Busta earlier in the tournament but was always likely to face a tougher task against Medvedev.

So it proved, with the qualifier going down 7-6 (9-7) 6-4 in a match that saw Medvedev hit 13 aces to his opponent's one.

"When the atmosphere is against you, you need to face it," Medvedev said. "You need to try to win, no matter what.

"Even when it is against me, I think, 'I will try to beat my opponent and the crowd' because there is no other choice."

Zverev kept his momentum going with a 7-5 6-4 win over Casper Ruud in Friday's final contest, as he made it eight wins on the bounce.

The German held serve throughout, while breaking his opponent twice, to remain on course for a sixth final of 2021.

Veronika Kudermetova and Liudmila Samsonova propelled a Russian tennis squad into their first Billie Jean King Cup final since 2015 as they sealed a 2-1 victory over the United States.

The Russians will meet Switzerland in the trophy showdown on Saturday, after Olympic champion Belinda Bencic defeated Ajla Tomljanovic to secure an unassailable 2-0 lead for the Swiss over Australia.

While Switzerland did not need a doubles decider, the Russian team, who are competing this week as Russian Tennis Federation, did.

Samsonova, who clinched her maiden singles title on the WTA Tour earlier this year, put them ahead in their tie against the USA, downing 2017 US Open champion Sloane Stephens 1-6 6-4 6-3.

Yet the USA hit back through Danielle Collins, who defeated Anastasia Pavlyuchenkova 6-7 (9-11) 7-6 (7-2) 6-2 – a contest that lasted two hours and 42 minutes in Prague.

Momentum was with the 18-time champions, but the Russians recovered in the doubles, with Samsonova and Kudermetova ultimately having little trouble in seeing off Shelby Rogers and Coco Vandeweghe 6-3 6-3.

Bencic saw off Tomljanovic to confirm Switzerland's place in the final, with Jil Teichmann having earlier overcome Storm Sanders 6-0 6-3.

Russia dominated this event, previously known as the Fed Cup, in the mid to late 2000s, winning four out of five editions from 2004 to 2008, but they have not triumphed since. Switzerland recorded their best result when a team featuring Martina Hingis finished second to Spain, way back in 1998.