I think that's a good point about American interest because it was similar when Querrey played Cilic IMO. You could hear PMac and especially Cliff Drysdale (who's not American, but is still a commentator for ESPN) get a little extra excited when Querrey won a big point as opposed to when Cilic did it.
I get it, it's an American station, but it does get tiring very quickly for me. I'm not saying they go full deadpan, but a little less obvious would be nice at the least.
Yeah, or maybe just talk in a more familiar tone about your compatriot, that would be fine. But the way the sport is going, and how globalised it is, these things become increasingly grating to hear in commentary. I mean, a Swiss (the traditionally neutral country) whose mother is South African, speaks many languages and whose overall behaviour is nothing but a PR's wet dream, is currently the greatest player in the game. You couldn't choose a better
tabula rasa or clean slate upon which to place almost every tennis fan's fantasy of glory: he's not too American, not too Eastern, he's European enough but not too European either, he plays all-court tennis, he's won every Slam, he even speaks French.
There's a fundamental contradiction at the heart of the worldwide tennis brand these days: 1) the gentlemanly neutrality of yesteryear regarding nationality (that was of course accompanied by racial bias and other terrible things; I'm not at all endorsing the rose-tinted narrative of the past) is disappearing and being replaced by raucous, populist nationalism, a trend that pundits, commentators and the media have no problem reproducing and intensifying; 2) at the same time, the sport is inevitably becoming a product of the world we live in, and if you look at players like Konta (Hungarian, Australian, British), Federer (what I mentioned before), Naomi Osaka (Haitian and Japanese), the "Polish" contingent in the women's game (Kerber and Lisicki, who are also German; Wozniacki, who is also Danish), to mention only a few, it becomes very difficult - a futile task, if you ask me - to try to assign specific national traits to these people, especially if we consider they're all playing an individual sport.
It's fine to have a preference for your compatriot when he or she is playing, although I find it more understandable when it's a country who is either 1) not first world or 2) not usually in the winner's circle when it comes to tennis (I understand the Brazilians going crazy with Guga, I understand Latvia going crazy with Ostapenko, etc). But first and foremost, it's an individual sport, and as such commentators should probably tone down on the 19th century/WWII/Cold War jingoism. Even Sharapova is a Russian who spent all her life in the US, for god's sake.
I say embrace the ambiguity and cheer for whoever pleases you the most.