Arthur is the latest player to explain the difference between Lionel Messi and Cristiano Ronaldo, and the Juventus midfielder has surprisingly changed his mind on who he prefers.
Lots of former and current players have their own view on whether Messi or Ronaldo is the best, in the age old question that will never have a definitive answer.
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There's only an elite group of players who have played with both to give a fuller insight and, back in June, Arthur joined those ranks, as he swapped Barcelona for Turin, with Miralem Pjanic going in the other direction.
Now the Brazilian has explained one difference he's noticed between the pair in the dressing room, and how they differ as leaders.
"Cristiano Ronaldo expresses himself more than Messi and he gets on with everyone in the dressing room," the 24-year-old told Desimpedidos.
"He's very active in the dressing room. He talks to everyone and has a good relationship with everyone.
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"Each person has their own way of demonstrating leadership. Messi does it with actions, as much as it seems he doesn't.
"He demonstrates it when he receives the ball, with his will to win the game and all his teammates notice this."
Arthur's comment about how Messi's actions don't 'seem' like those of a leader could just be a comment about how it isn't obvious leadership or it might be a dig about his wanting to leave Barcelona or even his recent sending off.
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The former Gremio player, who spent two seasons at the Nou Camp, was asked which of the two forwards, who have shared 11 Ballon d'Ors between them, he prefers.
"I'd go with Cristiano, we're playing together!" the midfielder explained in a quite unsurprising selection.
"I'm not that close to Cristiano that I go round his house for coffee, but we have a good relationship.
"Cristiano never backs down if there's a teammate in need of something and he always gets to it with a fierce determination.
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"He trains like an animal, he doesn't know when to rest and he encourages you to give your all.
"He always tells me what to eat, not leaving anything to chance."
To be honest, a work colleague telling you what to eat doesn't exactly sound like the most fun person to work with, and Ronaldo Jr certainly would know how you feel.
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The former Real Madrid star revealed recently that he gets annoyed at his son for drinking coke or Fanta.
Meanwhile, we're just waiting until someone currently playing with either Messi or Ronaldo picks the other as his favourite...
Featured Image Credit: PATopics: Football News, Barcelona, Serie A, Lionel Messi, Juventus, Cristiano Ronaldo, La Liga