One of his existing pals at the club is Fred, with the pair used to operating together in midfield for Brazil, and striving for World Cup glory in Qatar at the end of this year.
Casemiro has started to show the sort of form that made him integral to Real Madrid's spectacular success and it is obvious his on-field understanding and chemistry with Fred will only be a positive going forwards.
"It's not new to us," Fred said of his partnership with Casemiro. "We've played together for a while for the national team.
"He's a great player, it goes without saying really, everyone knows.