I only mentioned it so that nobody would be confused that maybe these tournaments took place in the US. Regarding the ATP: it was founded in 1972 by two Americans and one South African. Both the current Chairman as well as the current CEO are Italians, and the ATP's headquarters are in London, with branches in Florida, Monaco and Sydney. Certainly it's been influenced by American management practices, as basically every international corporation has, but the ATP is essentially a joint partnership between the tournaments and players, both of which have been about as international as it gets over the past 15 years or so. If anything, I'd say the ATP of the past decade-plus is more European than American given the prominence of Europeans in management and European stars at the top of the game. Tennis has also been making a big push to expand in Asia over that time period.
But anyway, the nationality (or lack thereof) of the ATP seems beside the point. It's clear the WTT is trying to port over as many aspects of the pro tennis tour into table tennis as possible (seriously, even stuff like how many rankings points different tournaments are worth). How well that will work, I'm not sure. But given how successful the ATP and WTA have been at attracting and keeping tennis fans interested, it seems like a reasonable place to start. Copying the player intros from the ATP finals is just one small part of that.