Zinedine Zidane, Ronaldinho, David Beckham, Luis Figo, Kaka, Andrea Pirlo.
Two-time World Cup winner Ronaldo has played with some of football's greatest ever players.
But unfortunately for Thomas Gravesen, the 48-year-old is not considered one of them.
Gravesen earned himself a reputation as being a no-nonsense, hard-hitting midfielder during his time at Everton, where he remains a cult hero.
Dubbed as 'Mad Dog' over his aggressive style of play, you'd have been laughed out of the room if you had suggested Los Blancos were prepared to make him their next Galactico.
But that's exactly what happened in January 2005, as they forked out £2.5million on the Denmark icon to add steel to their squad.
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And if you thought that poker-mad Gravesen would change his mindset after joining the world's biggest club, think again.
He famously threatened to kill Robinho following a training bust-up as well as knocking out one of Ronaldo's teeth after a wrestle.
Gravesen lasted a total of 18 months at the Bernabeu - featuring in 49 games in all competitions before being sold to Celtic in the summer of 2006.
The Dane's short spell was still enough to leave a lasting impression on Ronaldo - for all the wrong reasons.
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In an interview with ex-Brazil teammate Romario, who he won the 1994 World Cup with, Ronaldo was asked to name the worst footballer he played alongside.
To which he said: "There are a lot of them.
"There was one at Real Madrid who was a joke… Gravesen.
"He was a Danish midfielder. He was a really cool guy, good guy.
"A little while ago he won a $50million poker tournament or something.
"But in football he was very bad, he scored and he beat the hell out of people."
Even Gravesen's former boss Fabio Capello was often left mystified by the midfielder's tenacity.
Speaking after his altercation with Robinho, he stated: "He's just a little bit peculiar.
"I don't mess with him, he works well tactically.
"His behaviour is like this, and I don't like it. Everything has to be done like he wants it to be done."
Following Gravesen's retirement in 2008, he relocated to Las Vegas where it has been widely reported he has earned around £80m from playing poker.
While he may not have got Ronaldo's respect on the football pitch, fans will always hold a special place in their hearts for Gravesen.
