The sacrifices to follow Boca: Divorces, offering cars for flights and tickets and being sacked River vs Boca Testimony of Nicolas Mattera

In the stands of the Estadio Santiago Bernabeu on Sunday, two of football's most passionate fanbases will face each other.

Their love for their respective clubs means that sometimes the supporters of River and Boca go above and beyond the call of duty that many can't understand.

"I know people who have been divorced directly as a result of Boca. They were told 'it is Boca or me'," Nicolas Mattera, a member of the Boca Juniors fan club in Madrid explained.

"It ended up being Boca. It's something that can't be stopped and there are thousands of stories.

"Now, we are receiving about three or four hundred people a day from Argentina.

"There are some who have literally offered us their car in exchange for the flight and entrance to the game.

"Many people have also left their job to follow Boca or been sacked. They were told they couldn't have the day off and could decide on work or Boca.

"As I said, there are so many stories. Some are giving up their entire life savings to buy tickets and ask to sleep in the gardens of houses.

"The passion is so widespread and you see people going to La Bombonera who only have months to live to enjoy it once more.

"You'll see everything in Madrid."