Following are some reactions to his death:
ARGENTINA AND BARCELONA CAPTAIN LIONEL MESSI, ON INSTAGRAM
"A very sad day for all Argentinians and for football. He has left us but he isn't going anywhere because Diego is eternal. I'll remember the lovely moments I experienced with him and I send my condolences to his family and friends. Rest in peace."
ITALIAN SOCCER CLUB NAPOLI, WHERE MARADONA PLAYED FROM 1984-1991
"Everyone is waiting for our words but what words could we possibly use for a pain such as this that we are going through? Now is the moment for tears. Then there will be the moment for words.
"We are in mourning. We feel like a boxer who has been knocked out. We are in shock. A devastating blow for both city and club. Always in our hearts. Ciao Diego."
BRAZIL FOOTBALL GREAT PELE, IN A STATEMENT TO REUTERS
"Sad news to lose a friend like that. May God give enough strength to his family. For sure, one day we will kick a ball together in heaven."
ATLETICO MADRID COACH DIEGO SIMEONE
"When I was growing up Diego was the guide on how to play football. This painful moments hurts us all, because Maradona is football, he is Argentina, he had that rebellious character which defined him everywhere he went.
"He really looked after me when we were both at Sevilla and I was very young. Diego may have gone but his spirit will remain on every football pitch."
FORMER BARCELONA TEAM MATE BERND SCHUSTER
"Maradona was a leader on the pitch, opponents dished out the ugliest of tackles to him but he never stopped asking for the ball. We didn't know how to make the most of Diego at Barcelona, at times we left him alone on the pitch."
REAL MADRID COACH ZINEDINE ZIDANE
"It's an enormous loss for the world in general but above all for football. What he did in the 1986 World Cup is engraved in my mind. We feel awful about what happened today, we are very sad."
FORMER ENGLAND STRIKER GARY LINEKER, ON TWITTER
"By some distance the best player of my generation and arguably the greatest of all time. After a blessed but troubled life, hopefully he'll finally find some comfort in the hands of God. #RipDiego"
FIFA PRESIDENT GIANNI INFANTINO, ON FIFA.COM
"Today is an unbelievably sad day. Our Diego left us. Our hearts – of all of us who loved him for how he was, and for what he represented – have stopped beating for a moment. Our silence, our tears, our pain is the only thing we are feeling deep inside us at this time.
FORMER BRAZIL STRIKER ROMARIO
"His time on earth brought a lot of happiness to his country and seduced us all. I'll never forget all the laughs we had. He was never an adversary for me."
LIVERPOOL COACH JUERGEN KLOPP
"I'm 53 years old, my entire life, he was a part of it. Diego was a sensational guy. Maradona had some struggles. I will miss both."
MANCHESTER CITY COACH PEP GUARDIOLA
"There was a banner in Argentina that said: 'No matter what you have done with your life Diego, what matters is what you have done for our lives.'
"He gave a lot of joy and he made football better. What he did for Napoli and for Argentina in 1986 was something unbelievable. On the pitch he was unique. A once in a generation."
PORTUGAL AND JUVENTUS FORWARD CRISTIANO RONALDO, ON INSTAGRAM
"Today I say goodbye to a friend and the world says goodbye to an eternal genius. One of the best of our times. An unparalleled magician. He leaves too early but leaves a legacy without limits and a void that will never be filled. Rest in peace. You will never be forgotten."
FORMER ARGENTINA PLAYER OSVALDO ARDILES
"He'll be remembered as a genius in football. You can see the extraordinary amount of interest he generates. People like Ronaldo or Messi, they couldn't even dream of having this kind of admiration."