US English uses exclusively the singular (has). British English primarily uses the plural for teams and other groups of people, even though the noun is singular.
As a sports fan, it sounds really unnatural to say e.g. "Manchester United is winning" or "Wales has lost".
You're welcome. I find it fascinating.
Sports teams are only one example of where we (UK) use the plural verb for singular nouns. We do the same for departments, ("Legal have sent us some documents to sign)", bodies ("Management are investigating"), companies/organisations ("The BBC have increased the licence fee"), governments ("The Government are doing well in the polls"), authorities ("The local council have refused permission"), academic groups ("Year 9 have performed well"), schools/universities ("Oxford have beaten Cambridge"), to name but a few!
Basically any entity involving more than one person doing the action described.
Any of the above being in the singular, while of course grammatically correct, would instantly stick out as odd to a British reader/listener.