[ca245]

It's never made much sense to me to play the anthem for anything other than a match between national teams. 

I agree. 
I grew up in Brazil. Games between Brazilian teams were not preceded by a national anthem. But games between national teams were preceded by national anthems, and you knew this was a special game involving your country's team and your pulse quickened. That was a long time ago and my memory is not clear on matches between club teams from two different countries, but my recollection is that there were no national anthems either.

[ca245]

It's never made much sense to me to play the anthem for anything other than a match between national teams. 

I agree. 
I grew up in Brazil. Games between Brazilian teams were not preceded by a national anthem. But games between national teams were preceded by national anthems, and you knew this was a special game involving your country's team and your pulse quickened. That was a long time ago and my memory is not clear on matches between club teams from two different countries, but my recollection is that there were no national anthems either.