Manchester United take on Manchester City in the Manchester Derby this afternoon. For some of the players it will mean putting friendships on hold for 90 minutes as they go toe-to-toe in the Premier League.
Of course we are referring to the Argentinian contingent from both clubs.
Angel Di Maria and Marcos Rojo joined Manchester United in the summer, meaning they joined international colleagues Sergio Aguero, Pablo Zabaleta and Martin Demichelis in the city.
Di Maria and Aguero are particularly close. The pair are both 26-years-old and came through the ranks together on international duty together.
They won the FIFA Under-20 World Cup together in 2007 and an Olympic Gold medal as team-mates in 2008. This summer they were both members of the Argentina side that made it to the World Cup final - finishing as runners-up.
But the pair will have to consider their ten year friendship on hold when they go head-to-head in Manchester this afternoon.
Here are some pictures of the pair from down the years...