Santiago Alberione had the best moment of his life on Thursday when he bumped into ​Barcelona superstar Lionel Messi as he walked down the street in Castelldefels, the area where the legendary Argentinean lives.

Messi, ​who was invited to accept Catalonia's highest honorary award on that day itself, was seemingly in a good mood and posed for a photo with Santiago before signing a Barcelona jersey for him. Santiago was so starstruck that he posted this photo on to social media followed by an emotional letter which went viral.

As revealed by ​Marca, Santiago stated the following in his letter as he began, "An unforgettable day for someone who believes in an athlete. If you are anti-Messi, I hope you aren't even reading this. Today I fulfilled one of my greatest dreams, I met Lionel Andres Messi. I had the luck to take a photo with him and take a gift home which will be the most symbolic and historic that I could have related to sport."

He further stated, "The long-awaited moment came in Castelldefels around 09:00. I see this short guy with his weird shorts crossing the road and coming over to where I was, my heart went to eight beats a second, my throat went dry and the voice went weird when I told myself - here comes the flea, yes, it's Messi!!!!!! Next thing I ask with a lot of respect if I can take a photo with him, apologising for invading his privacy."

Revealing Messi's reaction, Santiago continued, "With a smile on his face he accepted and said not to worry, that I wasn't annoying him. Then he signed my shirt and asked if I was from Cordoba. I responded with another question, asking if it was so obvious that he noticed, with a smile and glassy eyes. With a sublime and humble laugh he said yes."

Talking about how his chance meeting with his hero ended, Santiago stated, "Then I thanked him again and repeated my apologies for annoying him, with a smile he said 'Don't worry, look after yourself' and gave me a hug and a handshake and he went home. They were approximately 60 seconds, but it felt like an eternity."

Finally, expressing what he felt after the moment, the young fan claimed, "Obviously afterwards I cried with emotion, I met the best player of all time (according to my criteria, to avoid debate). Today I fulfilled the dream of mine that few will understand as today I met Messi and today I am the happiest guy in the universe. I love you, thank you for being Argentine."