Adidas "Impossible Is Nothing"

A year or so ago, another "Impossible Is Nothing" ad used a song by a group called Calexico. The song was "Pepita" (audio sample, track 5) and is the same genre of music as what's in this "Football" ad you're asking about. It might be another song from the same group, just a hunch.
It's a track entitled 'La Morena' by ANDRES VEGA of Grupo Mono Blanco.

Listen to sample here (Track 11).