Given the Calzaghe v. Jones fight this weekend, I thought discussion of the subject is timely.

When did the British v. American boxing rivalry originate? I assume in the bare knuckles era.

How strong is it?

As a British or American citizen, are you more likely to root for a fighter from your country?

For example, with exceptions of course, I've found many British fans are critical of Kelly Pavlik and many American fans are likewise critical of Joe Calzaghe.