I thought maybe they played on astrotuf, but was corrected by
@GlasgowRedz (cheers), but the thing they've been doing, of using temporary grass has been terrible. The one in Atlanta was dreadful, according to Scaloni and several players:
(
https://the18.com/en/soccer-news/ar...ain-about-copa-america-grass-in-opener/136641)
There's a good breakdown of the issues and complicated nature of installation and use of temporary grass on artificial turf, here:
https://www.playmetrosports.com/pos...y-grass-over-turf-pitch-the-copa-america-2024
All of this is to say: it's not a pitch type you take lightly, and any players considered less than 100% fit, especially young players, should not be exposed to it (without great reason and justification).