I‘d probably go:
———-———Donnarumma————-
Nunes—-Dias—Gvardiol—Ait Nouri
—————-Bernardo-Nico G——-
——-Bobb———Foden——Doku——-
——————-—-Haaland——-———
Ait Nouri is a risk, but he‘s going to have to play at some point. And we need to give O‘Reilly a breather.
Cherki out would be purely tactical. As we don‘t have any other option for the centre of midfield, Bernardo has to play. But he can‘t be doing the kind of running he has been as the 6/8/10 and right winger. So it perhaps needs someone more disciplined on the right, so Bernardo can just play next to Gonzalez.
Could play Cherki as the 10 and rest Foden, but that would give us a non-existent press up top.
The alternative would be to play Lewis in midfield and rest Bernardo. But I just can‘t see that (and don‘t particularly want to either).
Can‘t trust Ake to play - he can‘t move his legs.
Rest the rest in the cup.