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Lionel Messi and his girlfriend Antonella welcomed their second son on Friday morning. Antonella gave birth to a boy, Mateo, in Spain. 

Messi's brother, Matias, announced the birth via Twitter.

Messi missed training on Friday to be by his girlfriend's side. Coach Luis Enrique says he is still available for Saturday's big clash with Atletico Madrid.

Lionel Messi's and Argentina are carrying the hopes of a country into the World Cup. (Getty Images)
Lionel Messi's family continues to grow. (Getty Images)