Devastated Sergio Aguero breaks down in tears before he can even start to announce his retirement, aged 33, at a special ceremony, after doctors told Man City legend to quit over irregular heartbeat

That's all from the live blog, a sad day for football as Sergio Aguero - one of the greatest strikers to ever play the game.

Stay tuned to the Sportsmail website for all the reaction to Aguero's announcement...

There's even a tribute from Real Madrid. Aguero played for two of Los Blancos' biggest rivals in Barcelona and Atleti - but a touch of class from the LaLiga giants.

And here's the goodbye message from Atletico Madrid to their former striker.

The Argentine scored 102 goals in 234 matches for Atleti and won them the Europa League and UEFA Super Cup in 2010. 

Tributes are flying in for Sergio Aguero as he announces his retirement from the game...

Here's rare footage of a teenage Sergio Aguero scoring a wonder goal for Independiente.

That was enough for Atletico Madrid to snap him up and then the rest is history...

Here are some quotes by Manchester City chairman Khaldoon Al Mubarak: 'The facts speak for themselves - Sergio is quite simply the most ruthless striker in the history of the Premier League.  It is extraordinary that his statistics, more reflective of two careers, are in fact those of a player whose time in the game was cut short.

'His impact lives not only in the club that we are today, but in the club that we will be for many years to come.  He has earned the adoration of the City family, and the respect of the football family the World over.'

What a moment this was. A goal that put Sergio Aguero into football folklore.

So many goals and so many trophies, but this stoppage time strike against QPR to win Manchester City their first Premier League title is one of the sport's golden moments. 

Barcelona coaches past and present come together to say goodbye to Sergio Aguero...

Manchester City boss Guardiola had his moment on stage with Aguero to congratulate him on his career.

Aguero scored 124 City goals in five seasons under Guardiola at the Etihad Stadium, winning ten trophies together. 

Pep Guardiola was present at the Camp Nou for Aguero's farewell alongside Manchester City sporting director Txiki Begiristain.

The pair had a reunion with Barcelona defender Gerard Pique, who was there supporting his now former team-mate at his farewell.

Here were the final words of Sergio Aguero's statement, told completely off the cuff and without notes, but with plenty of tears...

More touching words from Barcelona who are saying goodbye to Aguero after six months...

Here's some reaction from Manchester City, who have reacted to the news that their all-time record goalscorer has hung up his boots for the last time...

That's the end of the press conference and Aguero is getting a standing ovation from everyone at the Camp Nou.

Chants of 'Kun, Kun, Kun' come as well. Pep Guardiola, by the way, looks devastated by the news still. 

Aguero: I'm going to keep calm. I'm not going to do anything for a while. I'd prefer people say what I deserve. That they know the name that I've represented my entire career. I don't know, I'm not the one who decides what people remember me by.  

Aguero: Like I said before, it's better it happens to me now at 33 and things happen for a reason. It's positive as right now, I'm here. I don't have to count down and see if anything else happens. It's positive they've found something now rather than before. I'm trying to be happy outside of football, trying to enjoy all the things. As football players, people say it's easy. I can tell you now it's not. You train, have to travel, play. I think most people have respect for football players. I think I will stay connected to football and enjoy it a bit more.

Aguero: A really nice goal I scored for Independiente against Racing was one of the best goals I scored. I've got nothing against Racing but I was 17 and it was the first really nice goal that I scored. 

In the Europa League final with Atletico was a really happy moment. And then for City, the goal that I scored in the Premier League to win my first Premier League and the first one that City won. The truth is there are a lot of beautiful moments and the last one was to win the Copa America. 

I went to Barcelona and played two or three matches. It's something we were looking for for so many years and it was a really happy moment. And then I'll take the last goal as well against Madrid. 

Aguero: When a player plays lie we do, we always want to win more things. I can be happy with the titles that I've won. Anyone can always give a little bit more but I did everything as best I could for me personally and for the clubs. At the end of the day, you play as a team not an individual. Everything I did was to help the team and the club.  

Aguero: Obviously it's better happening now when I'm 33 rather than when I was younger. But like I said, I'm happy and proud of the career I've had. I'm fortunate it has happened to me now than rather than before. I'm happy for the career I've had.  

Aguero: I feel ok right now. Obviously the first two weeks were really difficult. When they did the first physical test on me in the clinic, the medical staff called me to tell me there was a big possibility that I couldn't keep playing.

I tried to process it all. It wasn't easy. I still process everything that the doctors told me straight up, "that's enough." It took a few more days to process it all. As the days passed I got a little bit more hope. I was just thinking, "nah, right now I'm ok". But I know it was difficult.  

Aguero: 'The truth is that everyone here treated me really well. For the other side, there are a lot of little fans, big fans and that surprised me a lot! The affection they showed for me.

'I've already said I would like to stay here and help my team-mates. Things happen for a reason. I wish the best to Barcelona and all my team-mates. They are great people, young players who can grow a lot. I'm really happy I've had this close contact with the club.'

Joan Laporta has made a brief statement: 'I'm here next to you. It's as if of all the teams you've played for are right here next to me. Atletico Madrid, Independiente, City, Argentinian FA. Spanish football FA as well.

'Sergio I think as we just saw on the video, we are left with the joy and excitement of what you could have been here at Barca. You have all our support and anything you need from your condition you can have it. For all the clubs, everywhere you've played, you've achieved so much. The friendships you've made.

'We would have liked you to come here earlier and now a new journey awaits and I hope that it would be just as successful and we wish you all the best, Sergio.'

Here's the heartbreaking moment that Sergio Aguero ended his career...

Aguero is now shown a special video made by Barcelona showing the best moments of his career and the waterworks have started once again.

Memories from Atletico Madrid, Manchester City, Argentina and his brief spell at Barcelona all feature. Joan Laporta looks emotional next to him as well. 

More Aguero: I made that decision a week ago but I did everything possible to have some hope but there wasn't very much. I'm very proud of the career I've had. I'm very happy. I always dreamt about playing football. 

I want to show my gratitude to everyone. Regardless of where I trained, Atletico Madrid who took a bet on my when I was just 18 years old. People from Manchester City, you all know how I feel about Manchester CIty. I did everything the best I could there. I'm very grateful as they looked after me really well. And then everyone here at Barca. Everyone's been incredible. It's without doubt one of the best teams in the world. I'm very grateful. And then obviously the Argentinian national team. I'm very grateful for everyone here. People who worked with me. Also to my team-mates and most recently those at Barca. I think I always did my best to help them win. 

I want to thank my team-mates who helped me to grow. I don't know what awaits me in the next life but I know there are loads of people who love me. And I'm grateful to the press that are here. Most of them have treated me well! But no worries, it's their work. I will remember all the amazing things, so thank you all.

Aguero: 'This conference is to communicate that I have decided to stop playing football. 

'I have decided to stop playing professional football. It is a very difficult moment. The decision I have made, I have taken it for my health. That is the main reason for my decision, for the problem I had a month and a half ago. I was in good hands of the medical staff that have done their best and told me that the best thing would be to stop playing.'

Aguero is already crying even before he starts speaking, and he takes his time in doing so.

Joan Laporta buys him more time by leading everyone in applause. Aguero is now talking...

There are not only members of Manchester City here, but also Atletico Madrid and Argentina representatives as well as his family.

And Aguero is now on the stage. This will be emotional...

Here's the scene, and the ceremony is just getting underway. 

Pep Guardiola has arrived at the ceremony...

Sergio Aguero is a little late to this press conference. We'll let you know when he arrives. 

In the mean time, here were the first reports that came through about Aguero's possible retirement around three weeks ago...

Sergio Aguero is not the only football to suffer from heart problems in recent years. 

Christian Eriksen's collapse at Euro 2020 due to a cardiac arrest over the summer was a high-profile incident but the likes of Daley Blind and Iker Casillas have also suffered heart issues as well. 

Respiratory problems have also been reported by players in recent weeks, including Sheffield United's John Fleck, Manchester United's Victor Lindelof and Sheriff Tiraspol's Adam Traore - though is has not been confirmed that these are heart-related issues. 

Former footballer Fabrice Muamba, whose heart stopped while playing for Bolton at Tottenham around a decade ago, claims football is too slow to react to reported or suspected heart issues...

The world of football has been giving messages of support to Sergio Aguero over the past month or so after reports have emerged over his reported retirement. 

Lionel Messi and his Argentina team-mates put out a special tribute to Aguero in their internationals last month and other figures, including Pep Guardiola, have also been speaking about how special the striker is. 

Here's Sergio Aguero's career record in full:

Independiente (2002-2006) - 56 games, 23 goals

Atletico Madrid (2006-2011) - 234 games, 102 goals

Manchester City (2011-2021) - 390 games, 260 goals

Barcelona (2021 - present) - 5 games, 1 goal

Argentina (2006 - 2021) - 101 games, 41 goals.

Career honours: UEFA Europa League, UEFA Super Cup, Premier League x 5, FA Cup, Carabao Cup x 6, Community Shield x 3, FIFA Under-20 World Cup x 2, Olympic Gold Medal, Copa America

Sergio Aguero has delighted many fans, players and managers over the years - and the Spanish press have given the forward a touching tribute in this morning's papers. 

'How well you have played' was the line from one paper towards the 33-year-old striker, who starred for the likes of Atletico Madrid and Manchester City over the years.

Here's all you need to know about Sergio Aguero's announcement, which is expected within the next half an hour.

As has previously been said, there is no official word on what Aguero will say. But with Manchester City boss Pep Guardiola flying in from the UK to be there in Barcelona, you feel this is a big announcement...

Could this be one of the saddest days in football?

Barcelona striker Sergio Aguero, who has been out for three months with a heart issue, is making a statement at the Camp Nou today to discuss his future.

While no official confirmation has been made about what he will say, it is expected the Argentine forward will announce his retirement from the game aged 33.

Known as one of the greatest strikers of his era, this will be an emotional time for everyone involved with the striker.

His press conference will start at 11am GMT (UK time) and we'll bring you every word he says right here...