In fact it is the assertion that they do that is ridiculous. And obviously so. Is the country footing the bill for them? No. Are they there because their countries requested them to be? No. Do the players themselves see it as representing their countries? No. Are golfers representing their countries in PGA events?
it seems to me that full Britain was rooting for Murray and hoping that he could won US Open , because he was definitely representing Britain as tennis nation and not only himself.