The 27-year-old was photographed sobbing after his team lost 7-1 to Germany in a dramatic World Cup semi-final.
He cried: “I just wanted to see my people smile.”
Rather than wallow in a defeated bubble of self pity, nine-year-old Brazilian fan Ana Luz decided to write to her hero and send him a few words of encouragement in his time of need.
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She wrote: “My name is Ana Luz. I saw all of the Brazil games in the World Cup and I liked it a lot watching you play.”
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“I think that you don't need to be sad because you played well and did the best you could. You were a great captain.”
She added, philosophically: “Life is like this, sometimes people lose and sometimes people win but people only need to be happy.”
“David Luiz, you are my champion.”
Luiz saw the letter, and was so touched that he decided to post it onto his Instagram.
He shared a photo of the adorable note with the caption:”Many thanks princess Ana Luz, loved your letter!.. And thanks to all Brazilians for all the support!”
Perhaps we can all look to Ana Luz’s positive outlook for some inspiration?