The attacking midfielder at 26 has already won a World Cup medal with his native Spain.
Considering their numerous accolades and highly talented squad, La Roja have not been ruled out of winning football’s biggest prize once more.
Firstly Mata and his team mates must compete against tough teams such as Chile and Holland in group B.
£37.1 million Mata had moments of brilliance for United last season and will hope to help his country lift a trophy once again.