Sergio Aguero "had nothing more to achieve" before his unfortunate early retirement, according to fellow Argentina forward Gonzalo Higuain.

Aguero was forced to call time on his illustrious career last December due to a heart problem following chest pains in a draw with Deportivo Alaves on October 30.

The former Manchester City star was informed it would be too much of a risk to continue playing, having made just five appearances in all competitions for new club Barcelona, who he joined in July.

While Higuain understands the circumstances behind his retirement were far from ideal, the Inter Miami man believes Aguero will reflect on his achievements fondly.

"Clearly no player wants to retire like this, but also Kun [Aguero] made an extraordinary career," Higuain, who played with Aguero during their time with Argentina, told Stats Perform.

"He is the top foreign goalscorer in the Premier League. Nobody wants to retire like that, but if he looks back he had nothing more to achieve. 

"Perhaps he lacked a Champions League, but that does not change the quality of player that he is and how he will be remembered. 

"I wish him to be happy and find something he is passionate about. Health comes first. We shared many years together and from the heart I wish him the best."

Indeed, Aguero leaves behind a remarkable legacy. The 33-year-old scored 184 times in the Premier League at a rate of one every 108 minutes, the best frequency of any player to net at least 20 in the competition's history.

Even when you extend it to all competitions throughout City's history, nobody gets within 80 goals of Aguero, with his 260 well clear of Eric Brook (177).

He also boasts the most Premier League goals for a single club in history, with his final strike – a header against Everton in May – taking him past Wayne Rooney's haul of 183 for one club (Manchester United).

Aside from personal accolades, Aguero lifted the English top-flight title on five occasions, tasted success at Copa America in 2021 and raised the EFL Cup an astounding six times. 

Arsenal boss Mikel Arteta described the horrific head injury suffered by Wolves striker Raul Jimenez at Emirates Stadium in November 2020 as among the scariest moments of his career, ahead of the Mexican's first return to the ground since his recovery.

Jimenez suffered a fractured skull in a sickening collision with David Luiz just minutes into Wolves' trip to Arsenal last season, which the visitors went on to win 2-1, returning to action with a protective headband eight months later.

Jimenez has hit five league goals for Bruno Lage's outfit since his comeback, and the Midlands club would go above Arsenal in the Premier League table with a repeat of last season's win, as the two clubs battle for European qualification.

On the eve of the Gunners' crucial meeting with Lage's team, Arteta looked back on a worrying moment for all concerned. 

"I have had others, but that was one of them," the 39-year-old responded when asked if it ranked among the scariest moments of his career.

"Straight away you saw the reaction, the anxiety that was suddenly in the team doctors and everybody involved trying to assess what was happening, it was frightening. 

"Thank god it ended the right way, but it looked really, really bad."

Arteta also revealed that his club remained in constant contact with Jimenez during his long recovery, as did the since departed David Luiz, who struggled in the aftermath of the incident.

"Of course, we were [in contact with Jimenez] and David was as well, because he was directly involved, he was really affected by that.

"We are colleagues in the end. We share the same profession and industry. When something like that happens, you are emotionally involved.

"In the case of Raul, it was a really scary moment. Thanks to the medical team, they probably saved [him from] something that could have been much worse."

Arsenal are looking to extend a four-game winning run in the Premier League when they host Lage's in-form team, and have lost only one of their last 10 home league games against the Molineux outfit (W5 D4), although that defeat did come on Wolves' last trip to the Emirates.

Jimenez, meanwhile, will be looking to carry over the form he has displayed from recent trips to another part of north London, netting in his last three visits to Arsenal's neighbours Tottenham, after Wolves' 2-0 win there earlier this month.

Napoli head coach Luciano Spalletti believes Barcelona still "have the same quality" without Lionel Messi, and has also drawn comparisons between Victor Osimhen and Diego Maradona.

Spalletti's side host Barca on Thursday in the second leg of their Europa League knockout round play-off, with the tie finely poised following a 1-1 draw in the first leg, which was the Blaugrana's first appearance in Europe's secondary competition since the 2003-04 season.

In those 18 years in between, Barca have lifted the Champions League four times, with Messi playing a starring role as he amassed 672 goals across 778 appearances in all competitions.

The Argentina international departed on a free transfer at the end of last season for Paris Saint-Germain amid well-documented financial complications at Camp Nou, but Spalletti does not think Xavi's new-look side are any worse off without the forward.

He told reporters at Wednesday's pre-match news conference: "Barcelona are really strong. They had Leo Messi, but they have the same quality now, with great players everywhere on the pitch. 

"Our target is to have a team that will remain in the fans' minds. We must fight. 

"Those who fight can lose, but who doesn't even fight has lost already. We need to take risks, command and show what we want to do, otherwise they'll force us to defend deep.

"It will be a tough game, we'll have to be like soldiers in a video game. A battle to conquer a position. Earn space, or you'll be shot and die."

Spalletti suggested before the first leg that Napoli and Barcelona legend Maradona would be looking down hoping his former Italian side can secure victory.

The Italian head coach referenced the Argentine great again, this time suggesting he could see similarities between his star forward Osimhen and Maradona.

"With that header against Cagliari, he proved to have a sort of animal fury which is much-needed in key moments," he added on Osimhen, who scored a late equaliser in his last outing.

"Maradona had the same thing and somebody else should have it in our team. 

"You can see Osimhen has it when he faces his opponents. He has outstanding characteristics and some extra qualities that are not easy to find in other players.

"We can become a team worthy or Maradona. He liked spectacular football and I am sure he'd like to see it tomorrow."

Mercedes boss Toto Wolff and his Red Bull counterpart Christian Horner have pledged to move on from the fierce rivalry that engulfed Formula One's leading teams last season.

December's Abu Dhabi Grand Prix saw Red Bull's Max Verstappen win his first Drivers' Championship in contentious fashion, after race director Michael Masi elected to unlap cars between Verstappen and leader Lewis Hamilton, permitting one lap of racing which saw the Dutchman snatch the title in the season's final seconds.

Mercedes reacted furiously to the result and rumours spread that a disillusioned Hamilton could even quit the sport, while Masi was removed from his role ahead of the 2022 season, with two new race directors appointed in his place.

Hamilton, however, will be going for an eighth world title this season and speaking at the first testing session in Barcelona, both Wolff and Horner were keen to draw a line under the events of 2021, and look ahead to the upcoming campaign.

"It [the rivalry] is to be expected," Wolff said in a news conference. "It got fierce at times and brutal, But there's a lot at stake.

"It's a Formula One world championship, there's the fighting on-track, and the fighting off-track for advantages. That's okay.

"But we need to move on. There's been so much talk about Abu Dhabi, it came to a point that it was really damaging for all stakeholders of F1, and we've closed the chapter and moved on.

"Now it's about 2022, the game is on again, all points to zero, new opportunity and new risk."

Alexander Zverev has apologised for his outburst at the Mexico Open that saw him "withdrawn" from the singles competition for attacking an umpire's chair. 

Zverev and Brazil's Marcelo Melo were in a super tie-break against Lloyd Glasspool and Harri Heliovaara when they were angered by a call made by the umpire, who overruled a decision from the line judge.

Glasspool and Heliovaara subsequently profited by delivering an ace on match point, which was followed by Zverev quickly walking off and smashing his racquet against the umpire's chair three times.

The world number three then shouted at the umpire that he had "destroyed the whole f****** match" before striking the chair again.

Zverev was due to be in second-round singles action against Peter Gojowczyk, but the ATP Tour confirmed the Olympic champion had been removed from the draw due to "unsportsmanlike conduct".

Former world number one Andy Murray condemned the 24-year-old's "reckless" outburst after his loss to Jannik Sinner, and Zverev has now apologised unreservedly for his raging response.

"It is difficult to put into words how much I regret my behaviour during and after the doubles match yesterday," Zverev wrote on Instagram on Wednesday. 

"I have privately apologised to the chair umpire because my outburst towards him was wrong and unacceptable, and I am only disappointed in myself. 

"It just should not have happened and there is no excuse. I would also like to apologise to my fans, the tournament, and the sport that I love.

"As you know, I leave everything on the court. Yesterday, I left too much. I am going to take the coming days to reflect – on my actions and how I can ensure that it will not happen again. I am sorry for letting you down."

Lewis Hamilton insisted Formula One must ensure that there is no bias from stewards heading into the 2022 season.

Hamilton was beaten by Red Bull's Max Verstappen in a contentious conclusion to the Abu Dhabi Grand Prix, after race director Michael Masi elected to allow a series of cars to pass a late safety car, permitting one lap of racing with the Dutchman on new tyres.

Masi has since been removed from his role, while rumours abounded that Hamilton could leave the sport, though the seven-time world champion last week confirmed he would be racing once again for Mercedes this season.

Two new race directors will share the role Masi has vacated.

At the first testing session in Barcelona ahead of the new campaign, which starts on March 20 in Bahrain, Hamilton was asked if the changes would result in more consistent decision-making.

"We need to make sure we have non-biased stewards, too," the 37-year-old said.

"Racing drivers, some are very good friends with certain individuals, some travel with certain individuals and tend to take more of a keen liking to some of them.

"I think [we need] people who have no bias, are super central when it comes to making decisions."

Hamilton's belief is not shared by his team's boss, Toto Wolff, however.

"I think we need professionalism in the stewards' room," said Wolff in a news conference.

"I don't think there is a conscious bias to be honest. It's intelligent people."

Red Bull's Christian Horner, who has a not-so-secret rivalry with his Mercedes counterpart, agreed.

"I would agree with Toto that I don't think there's an intended bias. I'm not aware of any stewards travelling with drivers to races," he added.

"In [FIA president] Mohammed [ben Sulayem] we have a new president that is looking to bolster the structure and bring in an equivalent of a VAR [video assistant referee, used in football], and I think giving a better infrastructure for clearer decisions with clearer regulations is something that should be strived for.

"But I certainly don't think there was any bias from any stewards during the last seasons."

Ireland will be without Iain Henderson for their home clash with Italy in the Six Nations after he tested positive for COVID-19.

Andy Farrell's side sit third in the table after a 29-7 triumph over Wales preceded a 30-24 loss to leaders France in the second round.

Ireland host winless Italy at the Aviva Stadium in Dublin on Sunday, but they will not have second rower Henderson to call upon after confirming the 30-year-old has contracted the virus.

Another spell on the sidelines will frustrate the Ulster captain, given he only returned from injury off the bench in the loss against France.

Henderson, who captained his country for the first time in February 2021, will now serve a period of self-isolation at home and will likely return for meetings with England and Scotland in March.

Ireland confirmed there were no other positive results within the squad and the group will continue to complete routine tests across the week.

Farrell will still have Tadhg Beirne, James Ryan, Kieran Treadwell and Ryan Baird as second-row options and has not yet called up a replacement for Henderson.

With another NBA All-Star weekend in the books, Thursday sees the league back in regular season action, with one of the more intriguing games taking place at Barclays Center when the Brooklyn Nets entertain the Boston Celtics.

They played in the same venue earlier this month, with Boston easing to a 126-91 victory, which the Nets will be eager to avenge this time.

Somewhat surprisingly given the strength of their respective rosters, Celtics star Jayson Tatum was the only player representing either team to play in the All-Star game, scoring eight points during his 20 minutes on court for Team Durant.

Kevin Durant missed the game in Cleveland with a knee injury and is likely to be out of this clash as well. 

Nets general manager Sean Marks recently said Durant and new arrival Ben Simmons could be ready to play in the coming weeks, but the visit of the Celtics is likely to come too soon for both.

Steve Nash's team currently sit eighth in the Eastern Conference on 31-28, having fallen away dramatically in the last month, losing 11 games in a row until beating the Sacramento Kings on Valentine's Day.

Injuries have played a big part in the dip in form, but back-to-back wins against the Kings and the New York Knicks suggested they could be about to turn things around, even with a defeat to the Washington Wizards in their last game before the All-Star break.

The Celtics, meanwhile, have been going in the other direction, winning nine games in a row before a loss to the Detroit Pistons ahead of the break, and they find themselves sixth in the East on 34-26.

Coach Ime Udoka has led his team to a five-game winning streak on the road and will be looking to make it six in Brooklyn.

He will be reliant on Tatum and Jaylen Brown to pick up where they left off. The Celtics' star duo combined for 57 points and 20 rebounds in the recent 135-87 thrashing of the Philadelphia 76ers.

The impact of guard Derrick White could also be crucial after his recent arrival from the San Antonio Spurs. He has made a respectable start to life with Boston, averaging 12.3 points per game in his four outings.

The restart of the league signals the beginning of what will no doubt be a tense run in a tightly contested Eastern Conference, and both these teams will be looking to get off to a perfect start on Thursday.

PIVOTAL PERFORMERS

Brooklyn Nets – Patty Mills

It's a home game, so Kyrie Irving (vaccination status) cannot play, and with James Harden gone and no Durant or Simmons yet, the pressure will once again fall on Mills to be his team's main man.

The Australian narrowly missed out on the three-point finals at All-Star weekend but is enjoying a career-best season for points (13.4 average per game) in Brooklyn after moving from San Antonio last year.

His three-point shooting is what has been letting him down in recent times, going five games in a row scoring single figures for points, before hitting 22 in the loss to Washington before the All-Star break, including five of seven from beyond the arc.

Boston Celtics – Jayson Tatum

Tatum has been his team's standout player this season, and the momentum from featuring in the All-Star game could see him raise that level even higher.

Only three players in the league have scored more than his 1,439 points this season (DeMar DeRozan - 1,547, Trae Young - 1,475, Giannis Antetokounmpo - 1,443), while only DeRozan (566) and Nikola Jokic (516) have hit more than his 500 field goals.

Interestingly, Tatum took more of a back seat when Boston beat Brooklyn earlier this month, with Brown and Marcus Smart (both 22) scoring more than his 19 points.

KEY BATTLES – Make a better start, Brooklyn

The recent game between these two saw the Celtics race out to a 35-16 lead after the first quarter. It was always a big ask for the Nets to do anything from there.

Where Brooklyn will likely look for success is in mid-range, where no team in the league has a higher percentage of field goals from (48.7). However, only four teams have a lower percentage of mid-range field goals allowed than Boston (39.9 per cent).

HEAD-TO-HEAD

Although the Celtics won at Barclays Center earlier this month, the Nets had won the previous four meetings between the two, including at TD Garden in November, and all three encounters last season.

Mikel Arteta believes Arsenal will welcome Jack Wilshere back with open arms in future after the Gunners academy product joined Danish side AGF.

The 30-year-old signed for the Aarhus-based team on a short-term deal initially, but an option to extend that contract by one year exists, with Wilshere desperate to prove himself after falling off the footballing map.

Arsenal favourite Wilshere, who began his career with the Gunners and helped the club win the FA Cup twice, has been without a team since leaving Bournemouth at the end of last season.

He was a teenage wonder with Arsenal, making his debut as a 16-year-old in 2008, but injuries have blighted his career in recent years. Prior to making the move to Denmark, Wilshere had been training with Arsenal in an effort to build up his fitness.

Following completion of the deal, Arteta was asked about the prospect of Wilshere potentially returning in a coaching capacity, and the manager was unequivocal in his response.

"One hundred per cent," Arteta told reporters. "I think everyone at the club would be willing to open the doors for him and try to find a role for him that would work for everybody. I think that will happen naturally in the future.

"It's been great to have him, and I think I'm speaking on behalf of everybody and the club, it's been absolutely a pleasure to have Jack back.

"To enjoy watching him play next to us, to have him around, the inspiration that he is for all the young people. Hopefully, we can help him – we have helped him a little bit as well – because he had some doubts with what to do, whether to start coaching or continue playing.

"I think this group of players have given him again that necessity to experience on a daily basis how magnificent it is to feel like a football player, and I think he wants to experience that again. We wish him the best of luck."

Emile Smith Rowe was among the Arsenal players to wish Wilshere luck for his new adventure on Instagram this week, with the attacking midfielder following a similar route to his compatriot.

Smith Rowe also came through the club's academy and appears set for a big future at Emirates Stadium and with England.

He scored Arsenal's first in the 2-1 weekend win over Brentford, taking his Premier League tally to nine goals from just 15 starts. Arteta does not think this is a fluke, though he did not want to put Smith Rowe's rise down to any one aspect.

"I think it's a combination of everything," Arteta said when asked if England recognition had been a factor in Smith Rowe's form.

"It's in his nature. Obviously, he needs to feel that confidence around the coaching staff, that we are the right people to guide him and take him to the next level.

"He needs his team-mates because they are big contributors to what he can do on the pitch. He needs to feel loved, have the right environment around him – his family, girlfriend, whatever is next to him – and when that happens he's got a good chance.

"The numbers should be looking something like this and it's not a coincidence. He's practising every day, he's working, he's open. He has willingness to do it because he knows he has the qualities and capacity to do it and that's what we have to demand from players whether they are 19, 20, or 35."

Mikel Arteta is relaxed about his future as Arsenal coach following reports a new contract is on the cards.

Arteta took over from Unai Emery in 2019 and won the FA Cup in his first campaign, also guiding the club to an eighth-placed finish in the Premier League.

He has come under pressure both last term – when Arsenal finished eighth again to miss out on European football – and in the current season, with the Gunners getting off to a shaky start.

But Arteta is generally considered to have made progress at the club, as they head into Friday's clash with Wolves just four points behind fourth-placed Manchester United, who have played three games more.

Arsenal, then, are arguably the favourites to take the final Champions League qualification spot ahead of United, West Ham, Tottenham and Wolves.

Arteta's role in that does not appear to have gone unnoticed, with reports recently indicating he is in line for a new three-year contract – while not exactly forthcoming on the rumours, he was undoubtedly relaxed.

Asked what the club had said to him about a potential new deal, Arteta said: "Nothing, it's just that I am really happy here and my aim is to build with the club a winning team that people enjoy watching, identify with and that can transmit what we want football-wise and as an organisation.

"As you think, things will happen naturally, like things that have happened in the last few months and now our focus has to be delivering what we want."

A key focus ahead of Friday's match was the race for Champions League football, which was made all the more pertinent by the fact visitors Wolves are very much in the hunt.

While Bruno Lage's men are two points behind Arsenal, they have a couple of games in hand on West Ham and Man Utd as well – victories in those would have them level on 46 points with Ralf Rangnick's side.

Arteta is not getting carried away with Arsenal's standing, but he could not hide his desperation to return to Europe's elite competition.

"I do, a lot," Arteta replied when asked if he misses the Champions League. "As a player I have experiences and it's one of best feelings you can have, to be surrounded by opponents that are the best in the world and challenge yourself and evaluate yourself against that kind of opposition.

"As a club, you play in a competition that brings a different dimension to the club, different impact. It's a competition that's very attached to this club.

"I'm happy with the direction we are taking, not happy with where we are. We want to be competing, challenging the best in the league in consecutive seasons."

Brendan Rodgers described Wesley Fofana as "a genuinely top player" as the defender returned to training with Leicester City.

The centre-back has not played since fracturing his fibula in a pre-season friendly against Villarreal last August.

Fofana's absence has felt particularly significant in a Leicester season blighted by injuries. Rodgers' side have won just seven Premier League games in 2021-22 and conceded 43 goals, with only three sides letting in more in England's top flight.

Leicester also shipped 11 in their Europa League group games as they finished third behind Spartak Moscow and Napoli, dropping into a Europa Conference League play-off against Randers, the second leg of which is on Thursday.

Fofana will certainly not be involved in that game and is unlikely to return for some weeks as Rodgers eases him back into action.

However, the Leicester boss is thrilled to have the 21-year-old back at the training ground.

"We have to be careful with Wesley, but we'll manage that," he said. "He's just joined training, so he's not imminently close to playing. We'll give him a few weeks training with the squad, and then we'll take it from there really.

"Just to see him back in training, it really shows what we've missed. This is a genuine top talent. When you see him come back in, it was like the first day he came in to train when he joined us. It's a different mentality – aggression, anticipation. It's just sheer quality that the boy has.

"We'll just build him up and there's no doubt, when he gets back to playing, it will be great to have him back in the team. Throughout his rehabilitation, he's been superb. For a young player, in particular, it's his first real big injury, so it'll be hard for him to be out, but he really focused on his work ever so hard.

"It's great to have him back. It's like JJ [James Justin] coming back in [from an ACL injury]. You see the quality of the player that you've been missing when they're back in the group. That gives the group a boost. He's a genuine top player. When you have that quality, you see the mentality of him.

"He's aggressive, he fights for every ball, he’s competitive and then, when he has the ball, he's got big quality. To have that back in your training will always improve the level. It's great for me to see that on its way back into the team."

Alexander Zverev has been "withdrawn" from the singles competition at the Mexican Open in Acapulco after attacking the umpire's chair at the end of his defeat in the doubles.

Zverev and Brazil's Marcelo Melo were in a super tie-break against Lloyd Glasspool and Harri Heliovaara when they were angered by a call made by the umpire.

A return on Melo's serve seemed to be called out by a line judge, but the umpire overruled the decision to put Glasspool and Heliovaara 9-6 up and give them match point, a subsequent ace ending the match in their favour.

As the pairs shook hands at the net afterwards, Zverev quickly walked off and smashed his racquet against the umpire's chair three times.

He then shouted at the umpire that he had "destroyed the whole f****** match" before striking the chair once more.

Zverev was due to face Peter Gojowczyk in the second round of the singles, but the ATP Tour confirmed the Olympic champion has been removed from the draw.

A brief statement read: "Due to unsportsmanlike conduct at the conclusion of his doubles match on Tuesday night, Alexander Zverev has been withdrawn from the tournament in Acapulco."

Rafael Nadal equalled the best start to a season in his career after winning his first match at the Mexican Open on Tuesday.

In his first match since a record 21st grand slam title in Australia, Nadal was a comfortable 6-3 6-2 winner over Denis Kudla, dropping only four points on serve.

Nadal is now 11-0 for the season, equalling the start he made in 2014, when his winning run was ended by Stan Wawrinka in the Australian Open final.

"I think I started playing well, a good victory in straight sets. That's always very positive for the confidence," said Nadal. "I think I played a very solid match for the first day.

"Of course, there are a couple of things that I can do better, but in general terms, I played well, so I can't complain at all."

Daniil Medvedev, who had also not played since the final in Melbourne, came through a tougher contest against Benoit Paire 6-3 6-4 in his opening match in Acapulco.

Medvedev held a two-set lead and looked in control before Nadal came roaring back to claim the Australian Open title, but the Russian could claim a landmark achievement in his first tournament since that heartbreak.

Medvedev, who faces Pablo Andujar next, will become world number one if he wins in Mexico, regardless of Novak Djokovic's performances in Dubai.

"It's always not easy to come back after some rest and some time off competition," he said. "I felt like my sensations were not at the top today, but I managed to fight until the end against a very tough opponent, and I'm happy that I managed to win."

Stefanos Tsitsipas racked up the 200th win of his career, holding off Laslo Djere to win two tie-breaks. He will now face J.J. Wolf, who surprised Lorenzo Sonego by fighting back from a set down to win 3-6 7-6 (9-7) 6-2.

Cameron Norrie was a straight-sets winner over Daniel Altmaier, while Yoshihito Nishioka battled through against veteran Feliciano Lopez.

Tommy Paul progressed after Matteo Berrettini retired when the American was poised to tie the match at one set all. John Millman also had to call an early halt to his match with Marcos Giron after a freak accident on court in which the Australian accidentally hit a ball into his eye.

At the Chile Open, home favourite Alejandro Tabilo beat Renzo Olivo in straight sets, while fifth seed Federico Coria was earlier knocked out by Yannick Hanfmann.

Miomir Kecmanovic defeated Marco Cecchinato, while there were also wins for seeds Sebastian Baez and Facundo Bagnis.