The brother of Barcelona star Lionel Messi has launched a tirade against his Argentine critics.

Argentine pundits are angry Messi has missed international week, but will play in the El Clasico against Real Madrid.

Matias Messi launched his blast on Twitter this morning: "For all the mediocre ANTI ARGENTINE!!! You see that in our team MESSI IS NOT (the) ONLY (one)!!!

"These people who destroy now want to interview him. THIS IS CRAZY (with) THESE PEOPLE?

"Leo prepares for Madrid, but he doesn't know if he'll play. After two months without playing - everyone knows this! Yet these people know nothing!"