That wouldn't be 'rubbish'. It's a valid issue.
He's had a stop-start summer. Playing for Uruguay in the Copa Amercia, then being out of the picture at PSG so lacking match fitness and sharpness at this stage.
I don't think we should throw him straight in as a starter in a huge game v Liverpool. Hopefully though he'll be available to come off the bench for half an hour or so. Then, after that, Uruguay have three matches during the international break, two of which are World Cup qualifiers and I'm sure he'll be involved in those, so he'll only arrive back from South America a few days before the league game after the break and so should probably only be a sub again.
Due to his late arrival, and then the international break, I'd say his first start should probably be the Crystal Palace match. We may well rush him straight into the team for either of the other two games, but I doubt he'd be at his freshest or sharpest.