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. 

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."

Kylian Mbappe to Real Madrid has often felt like a never-ending transfer saga, but it appears a resolution might now be in sight.

Los Blancos are apparently confident of getting the Paris Saint-Germain star in 2022 even though their performance did not impress him in the Champions League.

However, Madrid do have a back-up plan.

TOP STORY – MADRID CONFIDENT ON MBAPPE BUT MANE IS PLAN B

Real Madrid believe they will win the battle to sign Kylian Mbappe on a free transfer from Paris Saint-Germain in 2022.

Carlo Ancelotti's side are preparing to announce the deal at the end of the season, according to Goal.

However, should their efforts to sign Mbappe or Erling Haaland fail, Madrid have a back-up plan: Fichajes claims they will submit an offer for Sadio Mane.

ROUND-UP

- Arsenal are interested in signing Joao Felix from Atletico Madrid, according to television show El Chiringuito.

- Manchester United have been quoted €75million (£62.5m) for RB Leipzig star Christopher Nkunku, Bild says.

- Meanwhile, United striker Edinson Cavani is ready to listen to an offer to join Botafogo when his contract expires, Goal claims.

- According to Sport, Tottenham have submitted the firmest offer to sign Paulo Dybala from Juventus, but Barcelona and Inter are also interested.

- Milan are resigned to losing Franck Kessie after this season and could replace him with Renato Sanches, Tuttosport says.

- UEFA has decided to move the Champions League final from St Petersburg, according to the BBC. The game could be held in London.

The Champions League returns on Wednesday as the first legs of the round of 16 come to an end.

Manchester United travel to the Wanda Metropolitano to face Atletico Madrid, with the visitors aiming to become just the fourth team to 500 goals in the European Cup and Champions League combined.

Erik ten Hag's Ajax thrilled in the group stages with their high-scoring and free-flowing football, and they make the trip to the Estadio da Luz to face Benfica in the other first-leg meeting.

Here, Stats Perform unpacks the pick of the Opta data behind the pair of knockout fixtures in Europe's premier club competition.

Atletico Madrid v Manchester United

United and Atletico have somehow only faced each other in the same European campaign once previously, when the Spanish side were 4-1 victors on aggregate in the last 16 of the 1991-92 Cup Winners' Cup.

The Red Devils, on their only previous visit to Atletico, lost the first leg of that tie 3-0 at the old Vicente Calderon stadium against Luis Aragones' team.

Ralf Rangnick's away side will be hoping for happier returns on their next visit to Spain, where they have won just one of their last seven trips in the knockout stages of the Champions League (D4 L2).

But Diego Simeone's team have also tasted defeat in each of their last four matches against English teams in the competition, double the number of losses they suffered across their first 12 such matches (W4 D6 L2).

Atletico have won just four of their last 14 in the Champions League. Additionally, they have lost more times in their last four home games (three) than they did in across their previous 37 (two) in the competition.

The LaLiga outfit will have to contend with an old foe Cristiano Ronaldo, who has scored 25 goals in 35 matches against them, only managing more versus Sevilla during his entire career.

Indeed, four of the forward's club hat-tricks have come against the Spanish side, two of which have been netted in this competition – no other player has recorded more against a single opponent in Europe's top club tournament.

Benfica v Ajax

Benfica may have won the first European meeting with Ajax, a 3-1 win in the first leg of the 1968-69 European Cup quarter-finals, but they are winless in their six games against them since.

Ajax are unbeaten in their previous three away games at Benfica in the European Cup and Champions League (W1 D2), with the most recent of these coming under Ten Hag’s stewardship, a 1-1 draw in November 2018.

The reigning Eredivisie champions are unbeaten in their four meetings with Portuguese sides in the competition (W3 D1), while Benfica have won just two of their last 11 clashes with Dutch opponents across the European Cup and Champions League (D4 L5).

To reach this stage, Ten Hag's men recorded six wins from six, which is the longest winning streak by a Dutch team in the European Cup and Champions League.

Should they manage victory in Portugal, Ajax's seven-game winning run would be the longest in the history of the two competitions by a team outside of the current big five European leagues (England, France, Germany, Italy, Spain).

Sebastian Haller fired his side into the knockout stages with 10 goals in six European outings, the most by any player in his opening six matches in the competition.

Playmaker Dusan Tadic has also created more chances from open play than any other player in the competition (77) since his debut in September 2018, but Benfica will not just roll over given they have recorded clean sheets in five of their last seven Champions League games.

Weston McKennie was injured against Villarreal on Tuesday in a blow to both Juventus and the United States.

Midfielder McKennie had to be helped from the pitch with nine minutes remaining of Juve's 1-1 Champions League draw.

And reports after the game suggested the former Schalke man had fractured two bones in his left foot.

Head coach Massimiliano Allegri was still waiting on official confirmation as he faced the media, saying: "He is going for an X-ray to his foot; we hope it is nothing serious."

An extended period on the sidelines would prompt concern for both club and country.

While Juve are battling for a top-four finish in Serie A and hoping to advance in the Champions League, the USMNT have vital World Cup qualifiers against Mexico, Panama and Costa Rica next month.

McKennie's international team-mate Giovanni Reyna left Borussia Dortmund's most recent match through injury.

Romelu Lukaku was an unused substitute in Chelsea's win over Lille because Thomas Tuchel wanted to keep him out of "the next fire". 

Lukaku was the subject of intense criticism following his display in the 1-0 victory over Crystal Palace in the Premier League on Saturday. 

The Belgium striker managed just seven touches – the fewest of any player to complete 90 minutes in a single top-flight game since Opta has the data available (2003-04) 

Kai Havertz led the line against Lille instead of Lukaku and the Germany international opened the scoring in the first leg of the last-16 tie at Stamford Bridge on Tuesday. 

Christian Pulisic wrapped up the win for the Blues, with Tuchel pleased Lukaku was able to escape the spotlight. 

"It was not the moment after the match where everybody was focused on the few touches that we had to put him right into the next fire. It was the moment to take a step back. That was the decision and that's it," said Tuchel. 

"You can clearly see we have a strong win and strong performance. It was a tough match and almost every question is about Romelu. The focus is huge. There were nine other players who did not play. 

"We should never forget we consider this sport a team sport and the 11 guys who play do everything to commit fully to what we plan and commit fully to their team-mates. Those on the bench have to do the same and this is how it works. 

"Especially at Chelsea and especially for us and this is how we win football matches." 

Tuchel said prior to kick-off that Lukaku had been left out because he was "exhausted", though in his post-match news conference he clarified his comments. 

The German made it clear Lukaku has every chance of being selected for the EFL Cup final against Liverpool on Sunday. 

"Every game is different. The focus today was on intensity and a high-speed game. It was about hard work against the ball, off the ball and having intensive teamwork," said Tuchel. 

"Romelu struggled in the last few games a little bit to deliver that. That's what I meant when I felt him a bit tired both mentally and physically. 

"Since the Liverpool game [he missed on January 2], he started every match and there were some extra times as well. Today, we went for three other players with Kai in great shape, very confident and giving a lot of work rate and high-intensity metres for the team. 

"Yes, for the team, the decision doesn't need to be made today but can be in the next four days. He [Lukaku] has every chance to play." 

Since the Liverpool game, only Antonio Rudiger (960) has played more minutes for Chelsea in all competitions than Lukaku (861 – level with Cesar Azpilicueta). 

Fred suggested Manchester United must develop a long-term plan for success, while the midfielder called for clarity on who will be the next permanent manager at Old Trafford.

United have lost just one of 14 Premier League games since Ralf Rangnick was placed in interim charge following the dismissal of club legend Ole Gunnar Solskjaer.

That upturn in form leaves the Red Devils fourth in the league after a 4-2 win at Leeds United on Sunday, four points clear of Champions League chasers Arsenal and West Ham United.

Fred was on target in the victory at Elland Road, but the Brazil international believes a solution must be found for the benefit of United in the longer term.

"It's a bit strange," Fred told TNT Sports Brasil of working under an interim manager. "I know in football it's important to get good results as soon as possible, but it's also important to have a long-term plan.

"I think it's a little bad for us not to have one, at the moment it's all about the short-term goals. We don't know how it's going to be after the end of this season."

Rangnick has repeatedly reiterated that his focus is to secure Champions League qualification next term by finishing in the Premier League's top four.

The German manager has already agreed to stay on as a consultant after his short-term managerial role comes to its conclusion at the end of the season, with Mauricio Pochettino and Zinedine Zidane reported targets for United on a permanent basis.

But the immediate attention will turn to the first leg of their Champions League last-16 clash with Atletico Madrid on Wednesday, and Fred suggested the Red Devils are capable of winning the competition.

"I know we're not playing our best football, but we have a lot of quality names in our squad," he added. "I see many other teams playing far off from their best as well.

"[To win it] it wouldn't be crazy, it could happen, but we have to work our socks off because we're far away from being one of the favourites in this competition."

Thomas Tuchel regretted not substituting Mateo Kovacic earlier in Chelsea's win over Lille but hopes the midfielder and Hakim Ziyech will be fit for the EFL Cup final. 

Kovacic sustained an injury early in the second half of the Blues' 2-0 last-16 first-leg victory at Stamford Bridge on Tuesday, with Ruben Loftus-Cheek replacing him in the 51st minute. 

Ziyech also hobbled off before the hour mark after appearing to hurt his ankle, casting doubt over whether the pair will be available for Sunday's meeting with Liverpool at Wembley. 

Chelsea took the lead through Kai Havertz in the eighth minute and added to their tally through Christian Pulisic in the 63rd minute, making them the first English team to win five straight home matches without conceding in Europe's premier club competition.

However, Tuchel was frustrated he did not keep Kovacic out of harm's way by taking him off earlier. 

"I should've substituted Kova earlier at half-time so we could've saved one more change. I didn't see Hakim's injury and did not speak to the doctor yet. I hope it's not too bad," Tuchel told BT Sport. 

"It's a little bit the story of the season, that almost every game or every other game we do substitutions only because of injuries and not tactical reasons. It's following us. 

"Sunday is good because it's a lot of days for us to recover and be ready. In general, we don't like to have as many injuries and would like to have more impact from the bench in a tactical matter. But it is what it is. I hope the guys will be ready for Sunday." 

N'Golo Kante impressed at the heart of Chelsea's midfield and claimed an assist for Pulisic's goal following a lung-busting surge through the middle of the pitch. 

Tuchel was pleased to see Kante showing signs of his best form after a difficult run with injuries. His three assists in all competitions in 2022 are the joint-most at Chelsea and it is the same amount he managed across 75 appearances for the club in 2020 and 2021 combined.

"I was very pleased. It took him a while, I have to say. It was not the real N'Golo in the last matches. He struggled a bit with belief and intensity in his game in general," said Tuchel. 

"It was good he stepped up today. You can instantly see how big the impact is if he's in good shape – he's our game changer. He had a huge impact. I'm very happy for him and the team." 

Dusan Vlahovic scored on his Champions League debut as Juventus were held to a 1-1 draw by Villarreal in the first leg of their last-16 tie.

The former Fiorentina striker broke the deadlock after just 32 seconds at El Madrigal, netting the fastest goal in the competition by a Bianconeri debutant.

But Juve were pegged back when Dani Parejo capitalised on sloppy defending by equalising in the 66th minute.

Neither side could then find a winner, leaving the tie finely poised ahead of the return leg in Turin on March 16.

Leading the line in the Champions League for the first time since his move from Fiorentina, Vlahovic wasted no time in making his mark. 

Latching onto Danilo's long ball, he brilliantly slotted into the far corner past Geronimo Rulli, becoming only the second Juventus player to find the net in the opening minute of a match in the competition.

Villarreal looked to respond in the 13th minute; Alfonso Pedraza embarked on a driving run into the box before feeding Giovani Lo Celso, who was denied by the post.

Wojciech Szczesny was then called into action as he produced smart reflexes to block Arnaut Danjuma's clever flick towards goal.

The hosts turned up the pressure after the break and were rewarded with an equaliser midway through the second half.

Completely unmarked, Parejo collected Etienne Capoue's lofted ball into the area before neatly sweeping past Szczesny.

Adrien Rabiot was fortunate to avoid further punishment when booked for his rash challenge on Samuel Chukwueze, and Juve held on as Villarreal enjoyed a greater share of possession as the clock ticked down.

Kai Havertz and Christian Pulisic put Chelsea in control of their Champions League last-16 tie against Lille with a 2-0 win, but Mateo Kovacic and Hakim Ziyech went off injured. 

Despite Romelu Lukaku being dropped to the bench after a dismal showing against Crystal Palace on Saturday, Chelsea needed just eight minutes to find the net through Havertz. 

The reigning champions saw in-form duo Kovacic and Ziyech hobble off before the hour mark, casting doubt over their chances of featuring in the EFL Cup final against Liverpool on Sunday. 

Pulisic finished off a quick break after 63 minutes to secure a strong first-leg lead for Thomas Tuchel's side, with the return leg to come in France next month.

Havertz wasted little time in making his mark as the central striker, nodding home from Ziyech's corner after failing to take a couple of early chances. 

Antonio Rudiger almost turned a Renato Sanches cross into his own net and Lille threatened with a flurry of chances from the resulting corner as they started to get a foothold in the game. 

Chelsea were dealt a blow when they lost Kovacic and Ziyech in quick succession early in the second half, but they doubled their advantage in the 63rd minute. 

N'Golo Kante surged forward from inside the Chelsea half and fed Pulisic for a delightful dink over the onrushing Leo Jardim and into the bottom-right corner. 

Lille tried to reduce the arrears with a push for a late goal, but Edouard Mendy was never really tested and Chelsea remained in charge of the tie. 

What does it mean? Advantage Chelsea 

The Blues were always going to be the favourites in this match-up and they got the win that was expected of them despite being far from dominant. 

Chelsea have a good record when winning the first leg of a Champions League tie; in the 11 occasions they have won the opening encounter, they have reached the next round nine times. 

However, the two exits followed first-leg victories at Stamford Bridge against Barcelona in 1999-2000 and Liverpool in 2006-07. 

No room for Romelu 

Lukaku was dropped after having just seven touches across 90 minutes at the weekend. Havertz needed just five to have three attempts on goal and find the net with the last of them, showing he is more than capable of being a potent threat through the middle. 

Sanches shines in defeat 

Sanches proved he has come a long way as he returned to the ground where he infamously passed to a logo on an advertising board, which he had mistaken for a team-mate during an underwhelming loan spell at Swansea City in 2017. He bossed the midfield in the first half and played some lovely passes.  

What's next? 

Chelsea face Liverpool in the EFL Cup final at Wembley on Sunday, when Lille travel to Lyon in Ligue 1. 

Hakim Ziyech and Mateo Kovacic could be doubts for the EFL Cup final this weekend after hobbling out of Chelsea's Champions League meeting with Lille. 

Kovacic sustained an injury shortly after the restart in the last 16 first leg at Stamford Bridge on Tuesday and was replaced by Ruben Loftus-Cheek in the 51st minute.

Ziyech, who has scored in each of his past three Premier League appearances and set up Kai Havertz for the opener against Lille, appeared to sustain an ankle injury. Saul Niguez was sent on in his place in the 60th minute. 

Thomas Tuchel will no doubt hope the pair are able to recover in time to feature against Liverpool at Wembley on Sunday, with Chelsea chasing more silverware after their Club World Cup triumph earlier this month.

Atletico Madrid head coach Diego Simeone called for his side to produce a spirited performance against "one of the best teams in the world" Manchester United.

United head into the first leg of their Champions League last-16 clash on Wednesday having lost just one of their 14 Premier League games since Ole Gunnar Solskjaer was sacked as manager in November.

By contrast, Simeone's men – who have home advantage this week – have somewhat struggled in their LaLiga title defence this season.

However, Atletico secured a 3-0 victory over Osasuna on Saturday, and Simeone wants to see another battling showing against United, who he believes have transformed since the Ralf Rangnick's appointment in place of Solskjaer on an interim basis.

"We are facing one of the best teams in the world. In the last 14 games, they have only lost one," Simeone told reporters at Tuesday's pre-match news conference. 

"Since the arrival of the new coach, he has given them solidity, teamwork, commitment and shows how Manchester United always was.

"The new coach has made his mark, because you can see it is an intense, dynamic, courageous team with very good individuals. 

"The game will be tough, difficult, like all Champions League games, but we have the hope of being in our stadium and with our supporters."

He added: "The other day there was a great spirit in the team, you could see it. Hopefully it will be there again against Manchester United because then we will be able to compete better."

Atletico have lost each of their past four Champions League games against English sides, double the number of losses they suffered across their first 12 such matches in the competition (W4 D6 L2).

The LaLiga outfit have also won just four of their last 14 in the competition, despite progressing from the group stages in consecutive campaigns, while also losing more of their past four home games (three) than they did in their previous 37 (two) in Europe's premier club tournament.

Simeone's task at the Wanda Metropolitano was also made more difficult on Tuesday, after it was confirmed Atletico would be without their captain Koke for the United clash.

The midfielder suffered a muscle injury in the win over Osasuna, but Simeone insisted it would be an opportunity for others to step up.

"We have [Thomas] Lemar returning after COVID-19, which is important for us," he added. "[Yannick] Carrasco is also suspended...

"But there are team-mates who are very eager, waiting to show their ability."

Bruno Fernandes has become the latest player to dismiss reports of a divide in the Manchester United dressing room, insisting the team are sticking together.

A rift between captain Harry Maguire and Cristiano Ronaldo was reported ahead of Sunday's clash with Leeds United.

But Marcus Rashford and Maguire each responded on social media, while interim manager Ralf Rangnick described the claims as "absolute nonsense," before saying the 4-2 victory was the "perfect response" from his players.

Fernandes has also now denied the story, saying the togetherness and camaraderie of the group was evident in their goal celebrations at Elland Road.

"It is honestly people trying to complain and making stories about this club," said the Portugal midfielder ahead of Wednesday's game against Atletico Madrid.

"I don't know what people mean. I saw the goal of H [Maguire] and saw Paul [Pogba] running behind, sliding on his knees, happy for him. I was slapping his head and saying finally he had scored with that big head.

"We know when someone talks about this club or players at this club, it goes around the world with their voice. That is something that they want.

"For us, it is nothing. If we stick to the plan and stick together, that is the main thing: losing together and winning together." 

Romelu Lukaku was dropped to the bench by Thomas Tuchel for Chelsea's Champions League last-16 meeting with Lille on Tuesday. 

Belgium international Lukaku was a peripheral figure during Saturday's 1-0 victory over Crystal Palace at Selhurst Park and was named among the substitutes for the first leg against Lille at Stamford Bridge. 

He was replaced in the line-up by Cesar Azpilicueta, with Kai Havertz handed the central striking role and flanked by Hakim Ziyech and Christian Pulisic. 

Lukaku paid the price for a historically quiet game display against Palace, which saw him manage just seven touches – one of which was from kick-off. It was the fewest touches by a player who featured for 90+ minutes in a single Premier League game since 2003-04, when Opta has the data available from.  

Tuchel made two other changes to his team, with Marcos Alonso replacing Malang Sarr and Mateo Kovacic chosen ahead of Jorginho. 

Lionel Messi has expressed his enjoyment at developing a partnership with Kylian Mbappe at Paris Saint-Germain.

Messi departed Barcelona on a free transfer last August to move to the Parc des Princes, where he joined up with former Blaugrana star Neymar and France international Mbappe.

The Argentina international has managed just two goals in 15 Ligue 1 appearances for Mauricio Pochettino's side, who sit 13 points clear at the summit of the French top flight.

Despite a lean run of scoring form, Messi acknowledged how grateful he is to be playing with some of the world's best players, including talisman Mbappe.

"[Angel] di Maria and Ney[mar] I know them from before [at Barcelona and Argentina]," Messi said in an interview with PSG's media that was released on Tuesday.

"With Kylian it was the one I didn't know and little by little we get to know each other much more and within the field to try to relate better, to see how we feel comfortable with each other. 

"I was lucky to be with the best at Barcelona and today at PSG too, I'm happy and looking forward to continuing to do so."

Mbappe leads PSG's scoring charts this season, with 17 goals to his name across all competitions.

Since his debut for PSG in September 2017, only Robert Lewandowski (151), Messi (125), Ciro Immobile (118), Cristiano Ronaldo (116) and Mohamed Salah (110) have found the net on more occasions than Mbappe (103) across Europe's top-five leagues.

Meanwhile, from that same group only Lewandowski (80.55) can boast a better minutes-per-goal ratio than Mbappe's 99.99.

However, there is speculation the Frenchman may leave for Real Madrid when his contract expires at the end of the season.

But Mbappe showed no loyalties to Carlo Ancelotti's team just yet, with his impressive solo goal proving the difference in a 1-0 triumph over Madrid in the first leg of PSG's Champions League round-of-16 clash.

While Pochettino's side have to navigate a trip to the Spanish capital to secure their quarter-final berth, Messi believes PSG are equipped to win the competition.

"Winning the Champions League is difficult, it is a competition where the best are, any detail can leave you out," he added.

"So many great clubs and teams compete, we have a team to try to achieve it. We are very excited and we want to be able to do it but we have to go with peace of mind. 

"The best team does not always win and you have to be aware of all the details, the strong teams are the ones that achieve their goals."