'You Australian Twat'

Since i have been here i have copped only a small amount of flack from Poms for being an Australian, but i got my biggest dosage two nights ago when i was playing my nightly game of table tennis with American/French Sam.

'Err, we beat you in the final of the last world cup'
'You Australian Twat'

This is obviously part of going overseas as i would not attract this sort of attention at home, so i'm not angry or worried about it, but rather excited. But I was a bit baffled about the correct way to respond though. Obviously the socially acceptable thing to do would be to act all manly and throw some other sports statistic or fact at them and i was thinking of the last time Australia played England at soccer (3-1 our way) or mentioning the cricket. Yet this is like saying that my country is represented by sports teams, this is what my country is(and it is just a little too easy to beat an englishman with this sort of attack). Now i'm not the flag waving type and i despise nationalism, but I am proud about certain aspects of my country; that i get supported by my Government to go to University, that we are ranked 3rd on the UN's list of most livable countries, I quite like the landscape and Steve Irwin came from here.
So can i say this back to a jibe about the Wallabies footy team? I don't think it really matters, as these guys were so drunk that they wouldn't have remembered in the morning anyway...