Darmian is almost 34, he'll be fine in getting some rest without having to worry about who's taking his place
Again, it's a first world problem that I'm glad we have.34 isn’t really an issue for a defender, experience is as important there as talent is. We had several around that age the past 20 years in defence who had no issues with playing majority of the games… He was one of the few who did well for most part the last term and his first two games has been almost flawless.
I’m not in Darmians head, so can’t really know how he feel about it, but I don’t really know any starter who really enjoyed being degraded to dept regardless of age, especially if they actually where among those who actually performed.
Top football is just tough business, not much space for sentimentality.