Only that Argentina and Brazil can hardly be considered 'mediterranean'.
Have you been there? Southern Brazil and Argentina is about as mediterrenean as USA is anglosaxic, it is not like Mexico which has been mixed completely with the locals.
Just look at Del Potro, Belluci, Monaco and company. They have classic mediterrenean looks. Kuerten was ofcourse germanic and I would guess Nalbandian has some germanic ancestors besides his armenian blood.