The Selecao were focused on sealing qualification to the knockout stages on Monday, but the forward still made time to sign the mascot's boots before he walked onto the pitch.
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Richarlison is typically a villain on the pitch, however footage of him in the tunnel before kick-off showed he's got a heart of gold off it.
As he and the rest of his team queued up for their second World Cup game, the star was seen signing one of his country's mascots boots.
This isn't the only class off-the-pitch act that Richarlison will be getting praise for this week, though.
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In an interview with the Premier League, the Brazil forward spoke about the charity work he's doing back home despite him being based in London.
"A lot of people don't know that I have a house in Barretos where this is a cancer hospital," he said.
"I have a house there to help people who don't have money. So there they have free food, everything there is free. 10 per cent of my salary goes there so that I can help these people.
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"I also have a football club in my city that helps more than 100 families. So I think this is important, too. I help a lot of kids in Brazil in terms of charity, kids who want trainers, I help them."
He added: "I don't do this because I have to, I do this from the heart."
The Selecao star - who plays his club football for Tottenham - couldn't follow up the two goals he produced against Serbia in his country's opening game in Qatar, though.
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His second strike in that game is already a contender for being one of the tournament's best, as he pulled off a stunning bicycle kick to send the ball flying into the back of the net and seal Brazil's 2-0 win.
However, he missed the chance to add to his tally in Qatar, as he was taken off with 20 minutes to go against Switzerland to make way for Gabriel Jesus.
Brazil, in the end, sneaked a 1-0 win thanks to a Casemiro effort inside the box.